this is "nightline." tonight -- overexposed. have a sexy selfie? so do they. from celebs to the new nude reality stars. >> nice necklace. >> thank you. >> it looks like everyone's bearing it all. >> your [ bleep ] hanging out. >> why we're stripping down now more than ever. plus, let the royal baby mania begin. william and kate announce their little prince is getting a sib llg. >> great news. early days. >> why they delivered a premature message today and what a certain other prince had to say about it. >> it's great. and, land of lava. why is he going in there? we're taking you on a journey with an adventurer who knows no fear. how he plunges into the hottest place on earth and how he made it out alive. but first -- the "nightline"

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good evening. thanks for joining us. with that rash of nudity in the news, it seems some stars do want to keep their private parts private. and yet, it's not just celebrities bearing their bolds

recently. the iphone carrying crowds can and to a remarkable extent, are snapping sexy selfies. teens and even tweens shamelessly stripping down. so, when did it get so fashionable to get undressed? here's abc's paula faris. >> reporter: in a culture where less means more and skin is in, these days, everywhere you look, it seems like you have to -- um, look away. on hb o's "girls," it sometimes feels like lena dunham is naked in every episode. kim kardashian, who you are teenly posts racy photos stripped down and posed nude on the cover of the new issue of british "gq." and while they never intended them to become public just last week, jennifer lawrence and kate upton were among 100 celebrities whose alleged private nude photos became public consumption

after their i cloud accounts were hacked. why are celebrities taking naked photos of themselves to begin with? >> to be a celebrity, there is a serb amount of narcissim, where you feel like you are above everything. people want to see all of you. there is a sense of a bubble and people and celebrities feel like they're protected, but the reality is, if you are taking a digital image, you're not protected. >> reporter: still, it seems like everyone is doing it now. one study says up to 54% of u.s. adults are sexting. and that number rising to 70% among 18 to 24-year-olds. apparently nude is becoming the new black. >> when i was growing up, i don't recall thinking, i'm going to take a nude photo of myself. is this just a sign of the times? >> i think the internet, in terms of exposure and what we see in terms of images and certainly television now, there is this sense that anything goes. >> reporter: and just when you thought television couldn't shock you anymore -- >> this is awkward.

>> reporter: enter the naked reality show. >> your [ bleep ] hanging out. >> reporter: where contestants bear their souls -- >> oh, my god. >> reporter: and their bodies. on "naked and afraid," contestants are left in the middle of a hostile environment. no water, no food, no clothes. >> hi, how are you doing? >> how's it going? >> nice to meet you. >> i'm billy. >> i'm ky. >> hi. nice to meet you. i see you're naked. >> yeah, i know. i'm naked, too, and you're naked. >> yeah, yeah, nice necklace. >> thank you. i'm, like, so embarrassed right now. >> me, too. >> reporter: when ky was approached about being on the show, she initially said no. >> they're like, just bear with it, the title is "naked and afraid" and i was like, no way. and then they explained to me, you'll be pix lated. >> reporter: but the lack of clothing became the least of their worries as they struggled to survive for 21 days naked in the wilderness. >> get out. get out. >> snake, snake.

>> they bite you, you're done. i'm going to go rambo. >> of course you are. >> are you digging for something? oh -- oh, okay. now we have -- >> reporter: the conditions aren't quite as right in vh1's "dated naked." the show's concept? remove your clothes and expose the real you. all in hopes of finding true love. >> being named is a new way to meet someone in your most vulnerable state. >> reporter: contestants pack their dates with activities, like archery. >> i wanted to seal that since i saw "the hunger games." >> stand back. you pull it, aim -- >> reporter: one couple did find true love. >> it was the most beautiful part of the experience. >> reporter: and they are getting married. on tv, of course. >> this is too beautiful right now. >> reporter: but not everyone is happy. >> hi, i'm jessie.

>> nice to meet you. >> reporter: 28-year-old jessie was a contestant on the show. >> i'm extremely comfortable in my own skin. being naked really means absolutely nothing. >> reporter: but she's now suing viacom, vh1's parent company, for 10 million bucks for allegedly showing her too naked. >> you feel uncomfortable like this? >> i'm fine. how are you? i don't mind it. >> reporter: jessie claims she was humiliated after producers assured her certain parts of her body would be covered during a wrestling scene. but when the show aired, she says viewers were treated to the full monty. she pull out a statement saying, obviously, i did not expect the whole world to see my private parts. vh1 and their parent company viacom had no comment, but the lawsuit hasn't put a damper on the show's popularity. 4 million people tuned into the premiere of "dating naked." >> it's a different ball game and meeting people is so hard. so, there's barriers like the

internet and cell phones and all these things that get in the way of communication that breaking that down and getting rid of all of that and getting rid of the clothing again that we hide behind, really brings out different parts of people's personalities. >> reporter: a not entirely surprising success considering how well "naked and afraid" has done. >> 130 million people have now seen my naked butt, so -- >> reporter: naked tv is also popping up in places you wouldn't expect, like real estate shows. "buying naked" on tlc follows a real estate broker in florida, which happily calls itself the nudist capital of america. >> when people want to buy nudist real estate, they come to me. i've already sold over 25 homes to nudists this year. top that. >> reporter: her clients are the area's nudists. >> what can i expect when they come in? do i hug, do i shake hands? are they going to be clothed, are they going to be naked?

>> most likely they're going to be nude. >> reporter: though they don't need big closets, they do need a roof over their head. >> i'm amanda. >> i'm cole. >> i have been a nudist from almost 20 years. >> reporter: with those big audiences tuning in, the shows are creating a lot of buzz. what does it say about our culture that we're okay with nudity and we're okay with being naked? >> well, we live in a per misive culture, where we need new ideas and we need to be exposed. i'm not against nakedness, but i think certainly if you are going to be naked, you're going to take pictures of yourself, understand that you, once you take that digital image, you may have lost all criminal over that image. so, be prepared for the fallout and don't whine about it if it gets in the wrong hands. >> reporter: for ky, the overexposure was good exposure. >> i don't regret doing the show. i mean, i've always wondered if i could survive by myself from scratch, with absolutely nothing. it's sort of a dream of mine to put myself to that kind of

challenge with my survival skills. >> reporter: but the celebs whose raw images were stolen, they might be thinking twice before they snap. >> with every click, there's a risk. and if you are willing to assume that risk, by all means, do it. but if you're not, then the take-home message is, don't take naked selfies, don't take naked photos of yourself. >> reporter: for "nightline," i'm paula faris in new york. up next, the medical condition that forced the royal family to make a premature announcement today. what the baby news means for kate. [ terri ] my antidepressant worked hard to help with my depression. but sometimes, i still struggled to get going, even get through the day. so i was honest with my doctor. i told him i'd been feeling stuck for a long time. he said that for some people, an antidepressant alone only helps so much and suggested we add abilify (aripiprazole). he said that by taking both, some people had symptom improvement as early as 1 to 2 weeks. i wish i'd talked to my doctor sooner. [ female announcer ] abilify is not for everyone. call your doctor if your depression worsens

or you have unusual changes in behavior, or thoughts of suicide. antidepressants can increase these in children, teens and young adults. elderly dementia patients taking abilify have an increased risk of death or stroke. call your doctor if you have high fever, stiff muscles and confusion to address a possible life-threatening condition. or if you have uncontrollable muscle movements, as these could become permanent. high blood sugar has been reported with abilify and medicines like it and in extreme cases can lead to coma or death. other risks include increased cholesterol, weight gain, decreases in white blood cells, which can be serious, dizziness on standing, seizures, trouble swallowing and impaired judgment or motor skills. [ terri ] since adding abilify, i feel better. abilify and my antidepressant make a pretty good team. [ female announcer ] ask your doctor about a free trial of abilify and go to addabilify.com.

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prince george better watch his back. there's a new royal baby on the way to steal his spotlight, if not push him off the throne. the proud papa to be, the duke of cambridge announcing kate's pregnancy today. so, who is most excited about the expanding royal family? tonight, prince harry reacts. but what he has to say just may surprise you. here's abc's bob woodruff. >> reporter: feels like just yesterday proud parents will and kate were presenting the bay bill george to the world. but that was a little more than a year ago. now, they're ready for more. today, the royal couple announcing baby number two is on the way. >> we're thrilled. it's great news. >> reporter: but the news of kate's pregnancy broke a bit early for the royal couple. and here's why. they were due to travel today but kate couldn't make the trip because of a condition called hyperemesis gravidarum. >> to talk about hg, are you

talking about intractable vomiting that occurs sometimes more than once an hour for days, weeks or months. >> reporter: so, word of her pregnancy became headline news. >> big royal breaking news this morning. william and kate announced they are, in fact, expecting their second child. >> reporter: kate is nearly 12 weeks pregnant and is being treated as kensington palace, not in a hospital. >> she's feeling okay. it's been a tricky few days, week or so. early days. but i'm hoping things settle down and she feels better. >> reporter: this is the same condition that landed kate in the hospital during her first pregnancy. >> i think it's really important not to refer to this as severe morning sickness. this is not something that makes a pregnant woman a little queasy and can be cured with a saltine cracker and some ginger ale. this is something that, when it occurs in some cases, requires hospitalizati hospitalization. >> reporter: because of her condition, the palace says it will evaluate kate's engagements

from now on, case by case. the news but greeted with glee in london. the queen and members of both families said to be thrilled with the news. >> yeah, very exciting news. >> reporter: british prime minister dave cameron tweeted "i'm delighted by the happy news they are expecting another baby." >> ever since the dust settled on pregnancy and baby number one, people have, of course, notch rally been saying, when are they going to have baby number two? and now we now. baby number two is on its way. >> reporter: the whole world followed that first pregnancy, mar veming over her stylish maternity wear, people rushing to copy her outfits. what some people called replicating. and little george with a following of his own, including an entire website called prince george pieces, dedicated to the prince's outfits and toys. british designers like rachel riley have seen an increase in sales, thanks to kate's clothing choices for her son. as for the name george, the

royal birth helped propel it into the top ten baby names in the uk. as the world mimics the royal family, they are adapting to modern parenting. >> very special time, i think for any parent nope what this feeling feels like. >> reporter: prince william talked about his first few months as a father to cnn last year. >> he's a little bit of a rascal. let's put it that way. he kind of reminds me of my brother or me when i was younger. he wiggles around quite a lot. he doesn't want to get his feet down much. >> reporter: and what about uncle harry? this was, to be, a big week for the prince. harry turning 30. but now, he will be the fifth in line to the throne. >> the birth of this little baby, if it's a boy or a girl, is important, because it knocks prince harry down the pecking order one more place. this child, if it's a boy or a girl, will be fourth in line to the throne after prince charles.

>> with that growing family, your prospects of becoming king are reduced, isn't it? >> great. >> reporter: he shared his excitement about the announcement with typical harry humor. >> i can't wait to see my brother suffer more and if it's a girl, he'll suffer even greater, i think. like to see him cope with that. but in all seriousness, i hope my sister-in-law gets better soon and the two of them have the opportunity to, you know, go through the whole thing, the whole process again in a little bit of peace and quiet. >> reporter: further from the throne, but never far from the spotlight. a new document little released just last week, "harry at 30" shows how he has carved out his own role. >> i'm here to bring awareness to the problem, to carry on my mother's legacy. >> reporter: as with george, royal watchers all over the world are anxiously anticipating the birth. >> i think they are always going to try to have a biggish family. kate comes from, you know, a biggish family. i think they want more than, certainly want more than one child.

a lot of bechlts n sbets now, a girl, it will be great for a girl, buying stuff in pink, having the complete set. that will be perfect. william and kate seems to get things right. >> reporter: book makers once again placing bets on a name. their money is on elizabeth or victoria for a girl and if a boy, henry. it's anyone's bet that the wait for royal baby number two will generate the kind of hysteria outside the hospital that proceeded george's arrive value. expected around april, that will make george and his younger sibling about two years apart, around the same age gab at william and harry. >> they will grow up together. they will possibly have the same friends. they will be able to go through their milestones in life at a similar time and they will really be able to be each other's closest confidents. >> reporter: for "nightline," i'm bob woodruff in london. next, plenty of people love to explore, but how on earth does this guy plunge into the

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i'm sure you're asking yourself, so, how do you go about diving into a volcano? maybe the better question is, why on earth would you want to? tonight, we're taking you on a smoldering adventure into no man's land. he's the star of the video going viral tonight. meeted adventurer sam kaufman. that's him right there.

that lava, 2,000 degrees. that video, nearly 2 million views and counting. sam likes to go where no man has gone before. specifically, an exploding volcano. one of the most dangerous and inaccessible in the world. this is a crater in the south pacific. this is where sam took a death-defying dive, wearing a special heat suit. it's so hot, he could only get close to the edge for a few seconds at a time. but even then, that suit got damaged and burnt. along with a pair of guides, sam's among the first to take the plunge, so, naturally, he captured it all on go pro. more humans have set foot on the moon than the fiery depths of this deadly volcano. here's a good look at why. even getting here is a nearly super human feat. a 1,200 foot decent. filled with toxic smoke. so, why did sam spend four days there and descend not once, but twice into the gates of hell?

he says the fear of this was overshadowed by the thrill of this. like being on the surface of the sun. one false step and the whole plan could have gone up in flames. but sam gives the thumb's up to this adventure of a lifetime. we have to admit, playing with fire never looked so cool. and all that fun is far from over. sam will tell us what it's like to go all the way to hell and back in a live interview on "good morning america" tomorrow. and also tomorrow, waiting for the next big thick from apple? our david muir has exclusive access to the unveiling. make sure to tune into "world news tonight" and "nightline" for the historic event. thank you for watching abc news. we'll leave now, coming up soon with overnight breaking news. and always online at abcnews.com. good night, america.

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