what is the tattoo on the back of your neck? >> darlene. >> reporter: while cuffed, artundia searches to see if a gun was ditched. both of them have significant others waiting for them at home. they do the toughest shifts in one of the nais nation's toughest beats. the mission division, aka gangland l.a. and skid row. made famous by the movie "end of watch." like those cops a decade of experience has honed an almost feral instinct about criminal activity and protecting themselves. they wear the cameras on their hips, near their guns. >> my personal preference for being on the belt, i want the video to catch the suspect's hands. not only that, but if we get into that situation where we are in a shooting, i don't want my hands blocking the suspect's. >> you can't be here and your hands be blocking. >> right. how you're wearing it, your

hands would be blocking the suspect. >> is it helpful for you? >> it's only been a week, too early to tell. >> reporter: the video captures very little. mostly blackness as we race on a code 3. to what they know will be a prank call. and it jangles as we clamber up to a flophouse, knowing the officers will soon turn back around. they worry with police officers feeling under increased threat, when the real thing happens when their life is on the line, the camera will be a potentially dangerous or deadly distraction. >> what if there's an active shooter in front of me and i'm thinking about in instead of my gun? that's the only issue i have right now with this. >> reporter: another concern, it might not always give a complete picture. in some ways that makes this the product incomplete. gives you only that one snip pent of time. >> one piece of the puzzle. it's a big piece. in some cases it's going to be a huge piece. in other cases it's going to be a smaller piece. it totally depends on when it's activated, what the angle is,

where the individual's standing. >> reporter: lapd believes the cameras could protect its officers in the field and in court. and a couple of days before we interviews chief beck, reembedded with another unit that shot a man believed to be armed. >> dealing with the public, will we be able to see that? >> if presented in court it becomes part of the public domain. >> reporter: that means the public and media will have to wait. it's end of watch. artundia and spalenka dock their cameras, grateful a relatively uneventful night means they won't have video to review. matt gutman in los angeles. next, they publicly declare their marriage vows and their chastity. then this couple found unexpected infamy online. plus a belle says hello again and immediately gets a question in response. why does her shiny new music

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the young woman you're about to meet isroud to prove to her father she kept her promise to stay a virgin until her wedding day. so proud, in fact, she presented him with a serf purity signed by a doctor. then a photo of her big moment went viral, igniting a firestorm of criticism. here's my "nightline" coanchor juju chang. >> reporter: we've all heard of purity balls where young girls

remain virgins till marriage. 22-year-old brieland bowman took it one step further. >> i have a special presentation -- >> reporter: surprising her father, a pastor, with a framed serf purity. >> i am really excited. because i went to the doctors. and i got checked out. and my hymen is still intact. >> reporter: showcasing her chastity in front of her 600 wedding guests. >> i really wanted to prove to him at another level, dad, your word is good and my word is good and we did it. >> for her to be able to accomplish something, especially sexually driven, it was an exciting moment. >> reporter: the document signed by brieland and her doctor reading in part, to show how i have honored god and my earthly father in my body by maintaining my purity."

>> even though it was something presented to her, it was still her choice to decide to sign it. it wasn't like it was something that she was forced or made to do. >> reporter: her husband, 28-year-old tim bowman, says he was also a virgin until marriage. >> just to say that i was the first person to be with her and vice versa, i think it's just something that's special. >> reporter: when he takes to the mike about his purity, a slightly different reaction. >> i was worried about seeing there was no way they could verify -- there was no test they could run on me. you got to take my word for it. take to it the bank. >> there's a double standard here. he talked about his virginity and everyone laughed wit. right? it was really unimportant. whereas women's virginity, it really gets very deeply wrapped up in whether or not we think that young women have value. >> reporter: the couple who

>> i've dated people and got in situations where i've come close to not doing what i said i was going to do -- >> i don't want to hear that. i don't want to hear that. >> reporter: the newlyweds honeymooning in dubai when brieland's online posts about that purity certificate went viral. >> our phones blew up. >> whoop whoop whoop whoop whoop! >> we looked at each other. some of the stuff was seemingly nasty. >> very nasty. >> reporter: thousands commenting. one writing, why on earth is she presenting such a certificate to her father? another saying, how sexist is it that we're giving women away to their husbands as some sort of prize? where is his certificate? >> the idea that the most valuable thing a woman has is whether or not she's engaged in any particular sex act is insulting and dehumanizing for women, when we scrhe surface of it. >> reporter: brieland's husband says the negativity didn't shake their faith.

people have issues with it i think is an empowering thing. it's getting the conversation started. >> reporter: it's not just public ceremonies pushing celibacy, sometimes it's public personas. nick jonas was famously chained to his purity ring. you got me in chains >> reporter: but it didn't work out. confessing all to wendy williams. >> nick? >> yes? >> are you still a virgin? >> no. >> okay. just asking. just to be clear. taking off the ring could mean you're not a virgin or you're contemplating. >> no, i'm an adult in all ways, comfortable with who i am. >> reporter: selena gomez ditched her purity ring. and long before the wrecking ball, mylie cyrus had a chastity promise. >> i hope young people who are paying attention learn the right lesson which is that these abstinence pledges do not keep anyone from having sex, right? these celebrities put them on, then when they feel like having

study chastity pledges are just as likely to have premarital sex as nonpledge is where they do have sex they are less likely to methods. >> this is just a reminder, important. >> reporter: last year "nightline" visited caroline johnson just before her very own purity ball. >> one of the things that you were talking to daddy about was when am i going to get my purity ring? and one of the things that i think's important for us to remember is this is your desire to do it the lord's way, to really save yourself from kissing lots of toads along the way and wait for your prince charming to come along. so weep that on your finger and it's a daily reminder that at this point you're married to the lord. and your father is your boyfriend. >> reporter: pledging to her father to not even kiss until her wedding day. >> get ready to dance the night away. >> fathers, stand with me. will you stand together in this accord?

>> reporter: 60 like-minded fathers pledging to protect their daughters' vows. >> what i hear from young ladies is, there's this need for that physical touch. and from a male being. that's what i believe the father role is. >> let's take those covenants in the middle of your table. i choose before god to cover my daughter as her authority and protection in the area of purity. there's a pen in the middle of your paper, pick that up and sign that. then have your daughters witness that. >> reporter: it's an event to remember. a public declaration of chastity. >> these very public rituals, it's a way of evangelizing, a way of saying, this is the standard we should all adhere to. it's a way of trying to make it a cultural standard. the trouble with that is, there's no one size fits all approach to sex. >> reporter: as for the bowmans? >> i couldn't be any more happy, more proud. my wife is amazing.

public declaration. >> we're not virgin anymore. >> reporter: for "nightline" i'm juju chang in new york. and next, say hello to singer adele. after going on hiatus for years, it looks like she hasn't updated her phone since then either. [tires squealing] charged up. by design. heart pounding.

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finally tonight, pop stars make all kinds of curious artistic choices in their music videos. but tonight, while many of us are celebrating the new emojis on our iphones, adele is making head lines for a decidedly retro move. hello it's me >> reporter: with the simple hello, your favorite shoulder to cry on is back. multi grammy winner adele dropping her first full music video in years.

>> reporter: adole has been low-key since having a baby. she spoke to bbc radio 1 about the anticipation of a new album due in november. >> the only reason that people seem to react like how you're saying they are is because i haven't done anything else. i have been doing other things. i haven't been sitting around. >> reporter: making history as the first music video to be shoho using imax cameras, six minutes of classic adele, a soaring chorus, a troubled relationship. adele looking to the camera, looking into your soul. the video reaching nearly 20 million views in just one day. >> it's already happening! >> adele's music is too beautiful! >> reporter: videos celebrating the emotional effect her music has on someone like you. never mind i'll find someone like you >> reporter: what's with all those flip phones and that

the director, zauf xavier dolan says identifiable with everyday lives, as soon as you film these elements it's like you're shooting with every commercial. i find them to be nonnarrative in the meantimes. a retro choice to showcase a timeless voice. when i call you never seem to be home >> it was the incomparable ella fitzgerald who said, the only thing better than singing is more singing.

good night, america. >> announcer: the following is a paid presentation for the fat-burning fusion of pilates and yoga called piyo, brought to you by beachbody. >> hey, everybody, i'm maria menounos, and i'm about to reveal the latest breakthrough in fitness that won't kill your joints. it's an all-new way you can get that long, lean yoga and pilates body you've always wanted without having to stand still and meditate for hours or do microscopic mini moves. don't believe it? well, keep watching and you will. >> announcer: now there's a breakthrough new way you can completely transform your body without weights or high-impact moves, and the results are incredible. >> you see those results so quickly. you see the fat melting away. you see that tone in places that

you never had before. >> my arms, my thighs, my butt -- i mean everything has gotten smaller and tighter. >> announcer: introducing piyo, a new low-impact weight-loss and body-sculpting miracle from fitness and nutrition sensation chalene johnson that takes the best of pilates, the best of yoga, and fuses them together into one incredible program. >> i've combined the best of pilates and yoga to give you flat abs and a sculpted body and flexibility but with sequences that deliver a fat-burning cardio workout at the same time. >> i'm actually in better shape and smaller now than i was before i got pregnant. >> you just don't expect to have a six-pack after children. i have a six-pack at 40. >> announcer: and were going to show you just how something as low-impact and fun as piyo has quickly become the latest phenomenon from the biggest name in fitness, beachbody, the company behind p90x, insanity, and the 21-day fix.

and today, cha maria menounos, the ultimate authority of what's hot in hollywood, to share incredible stories from people who changed their bodies thanks to piyo. >> i've lost 40 pounds and 5 full dress sizes. [ applause ] >> announcer: and how some people even used this low-impact miracle to completely change their lives. >> i have lost over 100 pounds. [ applause ] >> thank you. now my kids have the mom that they deserve. >> announcer: and keep watching for an amazing free piyo offer you don't want to miss. now, here's your host and a total piyo believer, maria menounos. [ cheers and applause ] >> thanks, guys. today, we have got incredible news for anyone who wants to look better and feel better, and that's probably just about everybody, right? well, i want you guys to know that i understand the plight of wanting to lose weight. that was me when i was 40 pounds heavier. those are actually size 14 jeans. losing the weight and getting in shape was the best thing i ever

searching for something to help me maintain, and i definitely found that when i found piyo. i totally fell in love. i did the 60-day program. it was easy, it was fun, and not only did i maintain, but it really helped reshape my entire body in a very quick amount of time. so, you can see piyo works for me, but to really understand how something that's this fun and easy on your body can still be so effective, let's meet my friend and new york times best-selling author, motivational speaker, and a woman who's changed millions of lives, the creator of piyo, please welcome chalene johnson. [ applause ] hi. >> hey, girl. >> well, we're all dying to hear how something so low-impact can actually yield such incredible results. >> the key to getting great results is an intense workout, but it doesn't have to be hard on your joints. and that's why i created piyo. it is the best of pilates, the best of yoga, fused together. i add cardio so you're constantly moving.

i take out all the boring stuff, i take out all the rules, and i make it really exciting for people. so, i wanted to create short workouts. i wanted to keep people's attention. that's why i did a program where there's a different workout for seven days of the week so you're never bored and your body would never plateau. >> and i also love that there's no weights and equipment that are gonna make it harder for us. >> what i've done is taken pilates and yoga, where you're using your own body weight to sculpt your body, but for so many people, for them to really get results, they need to know what to eat. the results happen so much faster when you follow our food guide. everything is there for you. >> love it. [ applause ] and to prove piyo really is the perfect program for anybody who wants to lose weight and tone their body, regardless of their age or their fitness level, take a look at this. >> by doing piyo for 60 days, i've lost 14 pounds and 9 inches. this is the fittest i've ever been. >> doing piyo for 60 days, i lost 24 pounds, 15 inches, and i feel amazing. >> since starting piyo, i've lost 43 pounds.

energy level that i have today. thanks to piyo, i am in skinny jeans at age 64. >> being overweight was a struggle my entire life. i was teased so bad that i didn't want to go to class. and that really, really affected my self-esteem for a long time. i went to the doctor, and he said, "lynnette, you're going to start to have issues with your back, your joints. everything is going to start hurting." hearing that from my doctor was the wake-up call. i tried all kinds of cardio and boot camps, but i still wasn't where i wanted to be until piyo. i was looking for something that wasn't so high-impact based. the pilates and the yoga mesh well together and gave me the opportunity to kind of slow down and really define my muscles. i get my morning inspiration with chalene. >> come on guys! don't give up. you're strong. you're powerful. you've got great buns. you are awesome! >> piyo gave me that balance and that body that i was really looking for. that's my hips, that's my waist,

chalene lays out a perfect meal plan. with 60 days of piyo, i have lost 12 pounds and over 12 inches total. my body seems like it just perfectly morphed into this piyo body that i never thought could happen. i had no idea piyo would have such a profound affect on me, my body, my mind. it was the best decision i ever made. [ cheers and applause ] >> hello, beautiful. congratulations. >> thank you. >> i love your story. and you look incredible. i mean you're so fit. you look fabulous. >> thank you. >> how do you feel? >> i feel amazing. piyo has given me self-confidence, self-esteem. chalene comes into your living room, and you feel like she's your best friend. one of the first videos, she says "smile, you have so much to be thankful -- you have so much to be thankful for." >> you struggled your whole life with your weight and being teased. i'm so sorry for that, but the best revenge is this!