gripping the nation, people lining up for hours in the hopes they will strike it rich. >> i've got the winning ticket right here. >> jumping in on the office pools. >> 100% confident. and we're touring what your fantasy home could look like if you win big. >> whoever wins, call me. >> i was in shock. i was devastated. plus, a twisted love triangle. two doctors, one woman. she thought she found the love of her life until he was taken from her. and the woman at the center of this murder for hire scheme, telling us her story for the first time this night. and who run the world? perhaps it's channing tatum in an epic lip sync battle. but how did his performance hold up against sasha fierce?

five. number living well your immune system works hard to keep you on top of your game. you can support it by eating healthy, drinking fluids, and getting some rest. and you can combine these simple remedies with airborne. no other leading immunity brand gives you more vitamin c. plus it has a specially crafted blend of 13 vitamins, minerals and herbs. so when you want to support your immune system, take airborne,

good evening, thank you for joining us. tonight, it's the single largest powerball jackpot in u.s. history. and the odds that you or i will win is roughly 292 million to 1. despite that, millions of people

standing in line, and it seems just about everyone's imagination is running wild about what you could do with all that cash. >> reporter: imagine your life changing tomorrow. suddenly you can afford every luxury your heart desires, like this sprawling penthouse in new york city. >> i'm 6'4", so this is like three fredericks. >> frederick eggland would be happy to sell it to you. >> this apartment is a full city block. >> reporter: for $30 million. dreams of becoming an overnight multi millionaire are driving an all-out lotto frenzy. >> i look for it to grow some more today. we'll see what happens. >> reporter: the jackpot, $800 million and counting. the largest the world has ever seen. >> we've been waiting two hours. >> reporter: and on the eve of this powerball draw, people are lining up for a chance to win big. >> i've got the winning ticket right here.

there's the winner. >> no, probably not a winner. but still, people reporteraren't deterred by the odds, waiting over two hours today in prim, nevada. >> everybody's got a dream. >> reporter: after 18 drawings with no jackpot, numbers will be history-making. >> we're in uncharted territory. we're at levels we've never seen before. >> reporter: that $800 million prize is for payments paid out over third years.30 years. the lump sum payment is $496 million before taxes. that ain't so bad. >> we're about to go out and tell the employees that we just purchased 11 lottery tickets for the powerball this saturday.

from x ad is surprising her staff today with what could be a fortune. >> we know the odds, but if you don't play, you're never going to win. so we have to at least try. >> 11 powerball tickets. that's 11 chances to win. >> i know we've been hearing some buzz around the office. so we were thinking, why don't we buy tickets for the office? [ applause ] >> here are the tickets. monica and i are going to keep these in safe-keeping. if we win, half the winnings will go to the charities of our choice, the other half will be divided amongst all of us. >> these co-workers may love the camaraderie right now. >> i think it's amazing. >> reporter: but office pools can quickly go wrong. this group of california co-workers barely had time to celebrate their $315 million prize when they were sued by four co-workers who claimed they had oral agreements to be part of the office pool. a judge dismissed the cases. then this construction worker in new jersey, he was in charge of

his work pool. but without telling anyone, claimed a $38 million jackpot as his alone. he was sued and lost. >> if you don't do it right, there could be disputes. who's in the office pool? which ticket was purchased for the pool versus which for the individual? >> reporter: i went to the office where 15 of the interior designers are in the powerball pool. or is it 16? >> i thought i was in the pool. >> y'all don't know if the boss is in the pool. >> we have it written down. i don't know. >> this is the most unprepared pool i have ever seen. >> reporter: the group has just gone in together on 77 powerball tickets with no plan of what they'd do if they actual won. >> we'll work it out. >> they draw it on saturday. >> office pools can be good fun. >> the first thing is, whoever's buying the tickets needs to copy them, send them to the group in an e-mail, saying this is the group, these are the only people in the group and these are your tickets. >> this real estate office in

though the new girl had no money for a ticket, they still cut her in. >> the fact that we got to share an experience most never have in a lifetime, winning a powerball, we grew closer. >> now they're all really good, really rich friends, and ready to get even richer. >> i feel 100% confident. >> reporter: remember, it could grow to a billion dollars. so go ahead and dream big. recall that $30 million penthouse, you could buy 26 of them. >> whomever wins, call me. >> caller: you could beby-coastal with this $42 million estate in los angeles. >> may favorite thing about this house is how you walk in and see views all around. >> reporter: where no expense is spared. >> this is the sexiest master suite in beverly hills. >> reporter: if you want to wear your winnings, you could buy the

or 16,194 clutches for your closest friends. need some new wheels? maybe a tesla electric car. you could buy 7,619 of them. but before we get carried away, we should mention the odds. 1 in 292.2 million. in other words, you might as well wave your two bucks goodbye. but if you do win, be careful. >> friends are coming out of the wood work, family that they didn't know they had. >> reporter: winning big can come with big time trouble. you can do an easy internet search and find the disasters of lottery winners who lost all their monies. they spend it on houses and cars and they don't realize there's upkeep for those things. they buy things for their friends and families, to be the big shot. >> back in 1991, louizenberg went from electrician to millionaire when he won $5 million, then the largest

nearly 30 years later, his over-the-top spending has left him dead broke. but he was lucky compared to abraham shakespeare, who won $17 million. >> i would like my old life back, where i could walk the streets like a normal person. >> reporter: three years after he hit the jackpot, police found his body buried in this woman's backyard. she was later convicted of murder. but experts say you can avoid becoming the next lottery horror story. >> soon as you realize you're the winner, sign the back of the ticket, copy it, put it in a safe place. >> reporter: and keep a low profile. >> the reason you don't want to parade your family out in public is you don't want everyone knowing that your child now has $300 million. >> reporter: but most likely the odds are so low. this won't be your problem or theirs either. >> if you won, i would buy a beach house, a helicopter, a boat, and like six destinies for

>> there's no harm in all of us dreaming. t.j. holmes for "nightline" in new york. up next, a twisted love triangle that left one woman heart-broken in a murder for hire plot. and later, a hollywood hunk takes on queen b, stunning everyone in a show-stopping lip sync battle. (music) woman: i'll never remember all the projects, presentations, or meetings i gave up my nights for. (music's drums intensify) but days like this, i'll never forget. get out there, in the 2016 ford escape. be unstoppable. this is my fight song take back my life song

check this out, bro. what's that, broheim? i switched to geico and got more. more savings on car insurance? yeah bro-fessor, and more. like renters insurance. more ways to save. nice, bro-tato chip. that's not all, bro-tein shake. geico has motorcycle and rv insurance, too. oh, that's a lot more. oh yeah, i'm all about more, teddy brosevelt. geico. expect great savings and a whole lot more. if a denture were to be put under a microscope, we can see all the bacteria that still exists. polident's unique micro clean formula works in just 3 minutes, killing 99.99% of odor causing bacteria. for a cleaner, fresher, brighter denture every day. (politely) wait, wait, wait! you can't put it in like that... ...you have to rinse it first. that's baked-on alfredo. baked-on? it's never gonna work. dish issues?

it powers... through... your toughest stuck-on food. better than finish. cascade. (vo) what's your dog food's first ingredient? corn? wheat? in purina one true instinct grain free, real chicken is always #1. no corn, wheat or soy. support your active dog's whole body health with purina one. wow. the internet is crazy fast here. i know, right? it's so nice to have everyone over. hi hey. mmm. i just laid an egg. does anybody want it? joey, you want some gasoline? yes, please. mom, guess what? i married a clown and we're having tiny little clown babies.

with internet fast enough for everyone, your guests might get a bit carried away. get out of the past.

it was a real-life murder for hire love triangle in texas. tonight, how the twisted plot unfolded from dance lessons to

the woman caught at the center speaking out for the first time tonight. here's abc's ryan smith. >> i had always wanted, since i was a little kid, i'd see these older couples dancing. every step was perfect and every move was in unison. they were one. >> reporter: rashel was looking for the perfect partner in dance, and in life. she thought she found him. in a wealthy doctor. >> he was a wonderful dancer and he truced himself to me, my name's joseph. >> reporter: but somebody else wanted to cut in. >> hello, i'm dr. mike. >> what's the emergency. >> reporter: three people trapped in what would become a dance of death. >> there's a bullet. >> i need somebody to hurry. >> reporter: one of those people joseph sanjay, a well known doctor, successful businessman, and multi millionaire.

having a fun time. getting married? >> i don't think he would have gotten married again. >> at 19, sanjay married his high school sweetheart becky, but the marriage fell apart. so the doctor went back out on the dating scene. >> he went on a lark to a dance class, ballroom and salsa and swing. and through that dance community, he found his confidence again. >> reporter: and that's where he finds her. rachel shateena. >> she's blonde, she's tall, she's gorgeous. >> reporter: they have a lot in common. both divorced, both with grown children. their first date, a football game with his kids. >> reporter: it's the first date and he's bringing you around his family. >> it really wasn't a big deal to me. i certainly wasn't nervous about it. >> reporter: soon, he takes her to visit his grandchildren in los angeles. then to paris. >> it was really a dream come

we bought a lock, you throw the key into the river and that locks in the moment forever. >> reporter: but for rashel and joseph, it would only be weeks. rashel learns that the love of her life has been murdered. a landscaper finds his body. >> there are place cards everywhere. there's crime scene tape all around joseph's house. it was just absolute chaos. >> reporter: detective zach johnson catches the case and asks her to come in for questioning? >> how would you describe your relationship with dr. sonar? >> he's the love of my life. >> reporter: he asks her if she knows anyone who had a grudge against him. she rattles off a list about his ex-girlfriends.

>> his name and dr. michael dixon. >> hello, i'm dr. mike dixon. >> reporter: well known, he's divorced and wealthy. rashel and dr. dixon dated for a year and a half before she broke up. >> he knew thafes dating jason. he called him by name in a series of text messages. he wanted me to come back to him. i told him no. >> reporter: but is dixon the kind of man to take no for an answer? johnson wants to find out. so he drives two hours to amarillo for a face-to-face conversation with rashel's ex, that detective johnson secretly records. >> dr. dixon, i'm with the lubbock police department. >> his first thing was, oh, my, i don't know anything about him. >> i haven't talked to her in months and months. >> okay, well, that's a little

that he knew about the relationship. >> i'll be honest with you, i love, love, loved that woman. >> for detective johnson, alarm bells bells were sounding. >> reporter: dixon seems like a likely suspect, but he has an alibi the night of sonar's murder. >> there's something not right here, this is a huge whodunnit. until a witness comes forward with a name, dave shepherd, who soon confesses to the crime. >> he's laying on the floor, not moving, not breathing, nothing. i check his pulse in his neck. he's dead. >> reporter: he has no known connection to dr. sonar, but guess who he's best buddies with? dr. dixon. >> we just hit it off. >> it was an unlikely romance. dixon, a successful plastic surgeon, and shepherd, a divorced, con-man.

you know, she broke up his marriage and he just wanted, i guessing payback. >> reporter: that meant getting rid of the man she loved. >> he wanted him hurt and then gradually ended up wanting him killed. >> reporter: police arrest dr. dixon for ordering the hit on dr. sonar. but who will the jury believe, a respected plastic surgeon, or a con-man? in the first trial, shepherd reneged reneged, refusing to turn against his best friend. in the end, the jury couldn't reach a verdict. but at the second trial, one of the hitman's daughters takes the stand. >> we all asked him, how do you have money? and his words were, i did some work for mike and he paid me early. >> reporter: and you think that

>> in retrospect, absolutely. >> reporter: it takes a new jury only three hours to deliberate. >> the verdict is in. >> unanimous verdict. >> guilty on two charges. >> reporter: mike dixon is convicted on two counts of capital murder. he's appealing the verdict. as for the woman at the center of it all, rashel shateena has a warning. >> there are real sociopaths and psychopaths that walk amongst us. they're charming. they sit at the dinner table with you and your children, and sometimes they sleep in your bed with you. >> reporter: tonight, rashel shateena has put mike dixon out of her mind, but says joseph sonar will always have a place in her heart. >> i'll always love him. i'm just -- tell him how sorry i am. >> reporter: for "nightline," i'm ryan smith in lubbock, texas. >> dixon's lawyers still maintain shepherd acted alone

ordered the hit on dr. sonler. and they are appealing the verdict. up next, from "magic mike" to lip sync battles, channing tatum took the stage and beyonce crashed the party. so who had the fiercer performance? abc news "nightline" brought to you by pfizer. i was able to quit in three months. and that was amazing. along with support, chantix (varenicline) is proven to help people quit smoking. it absolutely reduced my urge to smoke. some people had changes in behavior, thinking or mood, hostility, agitation, depressed mood and suicidal thoughts or actions while taking or after stopping chantix. some had seizures while taking chantix. if you have any of these, stop chantix and call your doctor right away. tell your doctor about any history of mental health problems, which could get worse or of seizures. don't take chantix if you've had a serious allergic or skin reaction to it. if you have these, stop chantix and call your doctor right away as some can be life-threatening. tell your doctor if you have heart or blood vessel problems,

get medical help right away if you have symptoms of a heart attack or stroke. decrease alcohol use while taking chantix. use caution when driving or operating machinery. most common side effect is nausea. i can't believe i did it. i quit smoking. ask your doctor if chantix is right for you. [cough, cough] mike? janet? cough if you can hear me. don't even think about it. i took mucinex dm for my phlegmy cough. yeah...but what about mike? he has that dry scratchy thing going on. guess what? it works on his cough too. cough! guess what? it works on his cough too. what? stop! don't pull me! spoiler alert! she doesn't make it! only mucinex dm relieves bothwet and dry coughs for 12 hours with two medicines in one pill. start the relief. ditch the misery.

it's basically hollywood's finest facing off. beyonce versus channing tatum. thanks to "magic mike," we knew channing could dance, but how do his moves hold up when he's

>> reporter: channing tatum is no stranger to dancing in tight leather. but this is week's episode of lip sync battle, he brought the house down in a dress, with beyonce's "run the world" even borrowing her signature hair blowing bit. and in the moment no one saw coming, beyonce herself takes the stage showing him how it's done. channing has no choice but to bow down to queen b. her cameo lasted less than a minute, but already has up to 300,000 likes to her facebook page. all part of the season 2 premiere of lip sync battle. >> break it down for us. what exactly is lip sync battle? >> it's very simple. two celebrities perform two different songs and lip sync to the best of their ability and the audience decides who did it best. >> it's exciting and i think people just love to be somebody else for a few minutes.

he's not a rapper, he was so excited to rap. he was working that m.c. hammer. >> he was working it. >> my favorite part, we taped it before, it was oscar winner john legend and now we have oscar winner john legend in hammer pants and glasses. told you home boys can't touch this >> it's taken over social media too. club smash has become the most popular app. people upload videos of them doing the most popular songs, like whitney houston's "i will always love you." >> i got it in with lionel richie's richie's "all night long."

smith in hollywood. >> outstanding. thanks for watching. tune in to gma tomorrow and as always, we're online on our "nightline" facebook page and at abc news.com. goodnight america. dr. oz: acts of terror have destroyed our sense of security. now, a top security specialist shows you how to protect yourself in an emergency. >> help me, doc, we're going to throw up a signal. dr. oz: plus, grammy award winner monica, the tragic moment that changed her life forever. >> i could not move or get out of the bed. dr. oz: how she found the strength to take charge of her destiny and how you can, too,