♪ this is "nightline." >> tonight, powerball mania 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. inside this texas doctor's plot to kill. and the woman at the center of this murder for hire scheme, telling us her story for the first time tonight. and who run the world? perhaps it's channing tatum in

-- and beyonce. for a few glorious minutes, it was channing tatum up against beyonce in an epic lip sync battle. but how did his performance hold up against sasha fierce? but first, the "nightline" five. number one in just 60 seconds.

good good evening, thanks for joining us. tonight, it's the single largest power bhaul jackpot in u.s. history. and the odds that you or i will win is roughly 292 million to 1. yet despite the odds, everyone's imagination is running wild about what you could do with all that cash. here's abc's t.j. holmes. >> 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. >> reporter: celebrity real estate broker frederick would be happy to sell it to you. >> this apartment is a full city block. have you ever been in a full-city-block apartment? well, now you have. >> 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. >> right there, right there, there's the winner. >> reporter: no, probably not a winner. but still, people aren't deterred by the odds, waiting over two hours today in crazy long lines in prim, nevada. >> everybody's got a dream. >> reporter: after 18 drawings request no jackpot so far, this saturday's numbers will be history-making. >> we're in uncharted territory. this is a world record jackpot. we're at levels we've never seen before. we're going to be carefully monitoring sales tomorrow to see just how people react. >> reporter: that $800 million prize is for payments paid out over 30 years. if you're like most winners,

you'll want that cash immediately, which comes to a lump sum payment of $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. >> atop the 60th floor, monica hoe of the mobile marketing firm 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. >> reporter: 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. all right? >> reporter: 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 buying the lottery tickets for 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? >> are you in the pool? >> 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. >> before 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 florida hit it big, and even 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 be bicoastal with this $42 million estate in los angeles. >> my 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 45.5 carat hope diamond. you could buy two. or an hermes, crocodile clutch, 16,194 of them 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. everyone's going to be asking for handouts. >> reporter: winning big can come with big time trouble. >> you can do an easy internet search and find the disasters of some of the lottery winners who have lost all of their money. and they're really sad stories.

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. >> reporter: back in 1981, light bulb lou eisenberg went from electrician to millionaire when he won $5 million, then the largest lottery pay-out. 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 i won, i would buy a beach house, a helicopter, a boat, and like six destinies for all my friends. >> 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.

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♪ it was a real-life murder-for-hire love triangle in texas. tonight, how the twisted plot unfolded from dance lessons to deadly consequences. 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: rachelle shetina 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 introduced himself to me, my name os -- name's joseph. >> reporter: but somebody else wanted to cut in. >> hello, i'm dr. mike dixon. >> 911, 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 sonnier, a well known doctor, successful businessman, and multi millionaire. >> he's living the single life, having a fun time. >> reporter: so it wasn't about getting married? >> i don't think he would have gotten married again. >> at 19, sonnier 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. rachelle shetina. >> 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 true. we bought a lock, you throw the key into the river and that locks in the moment forever. >> reporter: but for rachelle and joseph, forever would only be a matters of weeks. on a sweltering wednesday in july, rachelle learned that the love of her life has been murdered. a landscaper finds his body. >> there are placecards 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. sonnier? >> he's the love of my life. >> reporter: he asks her if she

knows anyone who might haveme wanted to stop the doctor or held a grudge against him. she rattles off a list about his ex-girlfriends. she asks her about her past boyfriends. one name is on the tip of her tongue. >> his name is dr. michael dixon. heaz a plastic surgeon in amarillo. >> hello, i'm dr. mike dixon. >> reporter: well known, he's divorced and wealthy. rachelle and dr. dixon dated for a year and a half before she -- they broke up, and she started seeing dr. sonnier. >> he knew that i was dating joseph. 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 rachelle's ex that detective johnson secretly records. >> dr. dixon, i'm detective

johnson with the lubbock police department. >> i told him rachelle's boyfriend and 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 odd, because she told us that he knew about the relationship. >> i'll be honest with you, i love, love, loved that woman. i really did. >> reporter: for detective johnson, alarm bells were sounding. >> i really had fallen head over heels. in fact, made a lot of changes for her. >> reporter: dixon seems like a likely suspect, but he has an alibi the night of sonnier's murder. detective johnson is stumped. >> there's something not right here, this is a huge whodunnit. >> reporter: 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: shepherd has no known connection to dr. sonnier.

but guess who he's best buddies with? dr. dixon. >> we just hit it off. >> reporter: it was an unlikely bromance. dixon, a successful plastic surgeon, and shepherd, a unsploimd -- unemployed con-man. >> he left his wife for her. you know, she broke up his marriage and he just wanted, i guess, payback. >> reporter: that meant getting rid of the man she loved. >> he wanted him hurt and then gradually developed into having him killed. >> reporter: based on shepherd's confession, police arrest dixon for ordering the hit on dr. sonnier. but who will the jury believe, a respected plastic surgeon, or a con-man? in the first trial, shepherd 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. he takes the jury back three years. her normally cash-poor father treats them to a fancy steak dinner. >> 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 was a prepayment for killing dr. sonnier? >> 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, rachelle shetina 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, rachelle shetina has put mike dixon out of her mind, but says joseph sonnier 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 and that their client never ordered the hit on dr. sonnier. 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. 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.

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♪ 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 strutting next to sasha fierce? here's abc's rachel smith. >> reporter: channing tatum is no stranger to dancing in tight leather. but on this week's episode of spike tv's 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 a 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." hosted by l.l. cool j and

christie teaguen. >> 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. my husband john was on it. 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 >> the lip sync craze has taken over social media too, with over 75 million users and counting dub smash has become one of the most popular apps. people upload videos of them doing the most popular songs, like whitney houston's "i will always love you." >> naturally, i had to get in on the fun too, with my go-to

karaoke song, lionel richie's "all night long." what were once hair brush embarrassing moments in front of the bathroom mirror, are now online for the world to enjoy. for "nightline," i'm rachel 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. have a great weekend and good luck. at abc news.com. goodnight america.