this is "nightline." >> tonight, celebrity twitter war. over kim kardashian's naked selfie. the sexy star slamming her unlikely ally for kim k., kanye's ex amber rose telling us why she's now defending kim. >> if any sexy guy posted a nudeverybody would be like, he's hot, he's sexy. it's just a double standard. problem. we explore the very realal shaming. plus just call it nascar on ice. the only thing harsher than the

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this is what i came home for -- to worg schools after hours into centers for healthcare and safe spaces for our kids. i'm p.g. sittenfeld. after princeton and a marshall scholarship, i turnedork improving education. elected to city council, i've helped create 5,000 new jobs, took on big banks to clean up foreclosed properties. now i'm running for the senate and approve this messageold new leadership for ohio. good or joining us. kim kardashian has built a multi-million dollar brand

some might say ked photo she posted this week sparking a celebrity tweet storm. the backlash shining a spotlight on body shaming and social media attacks, issues that reach farttery confines of hollywood. the woman who broke the internet is back at it again. this week kim kardashian tweeting the self-censored nude selfie with the caption ike i have nothing to wear lol." which should have been just another sexy snapshot drawing millions of likes drew headlines instead when it sparkedm some famous names. and sparking an important conversation about what women should and should not do with their bodies. big stars with a strong reaction tweeting, if kim wants us to see a part of her we've never seen, she's going to have to swallow the camera. and chloe grace moretz kim to teach young women that we have so much more to offer than

the backlash nothing new for kim. on her reality showe target of taunts from strangers.ay have finally had enough. this latest celebrity twitter feud setting off a flurry of late-night tweets with kim hitting back at bette.want to bring up how you sent me a gift trying to be a fake friend then come at me. "nylon" magazine. the war of words turning the wild child mylie cyrus into the arbiter of good taste weighing in on instagram. dear women, you all are acting asking those involved to come together and try to create and bring jobs to other women in desperate need. the public spat is not just fodder for gossip, it's leaving some tocism against kim is just a form of public shaming that could be sending a confusing and

girls. amid the firestorm, an unlikely >> i thought she looked beautiful. i think she's a great mom. and i'm going to pick up for kim. >> reporter: model and actress amber rose, thehistory came to fame after marrying and separating from rapper with khalifa and dating kim's now husband kanye west. >> people think me and kim are archre not. we literally text each other all the time. we're very positive towards each other. i'm a mom, i know how hard it is to like work out and tryback. but at the same time embracing the fact that your body does change after you have a baby. >> reporter: amber says she came to kim's defense as a way to stand up for all women under fire because of their sex appeal. >> people feel like kim is just famous because she had a sex

still be sexy because we were ex-sex workers. >> reporter: kim vented on her website asking the public to please move on from her sexade 13 years ago, writing, it's 2016, the body shaming and slut shaming, it's like enough is enough. i will not live my life dictated by the issues you have with my you be you and let me be me. >> if any sexy guy posted a nude picture with a littleer his private areas, everybody would be like, damn, he is hot, he's sexy, look at that body, he's a dad too? it's just a double standard.r: an activist who travels the country raising shaming. amber fronted what's called the slut walk in los angeles last ublic demonstration against sexist double standards and victim blaming. >> i want to thank everyone that came out.

>> reporter: experts say it will take much more to undo years of social conditioning. from the public's vilifying of monicae clinton sex scandal to movies like "easy a." >> everyone is calling her a dirty skank! >> reporter: "mean girls." >> a little >> reporter: the finger wagging when caitlyn had sex with one of the guys on the abc reality show. >> i didn't mean to do anything that would cause anybody any problems. >> reporter: girls are expected to walk the fine linesexy and slutty. on celebrity instagram feeds they see immediately the more get. but unlike boys they're punished for being too sexual or s. it's a double standard learned as early as sixth grade. at recent study of 15,000 adolescents showed that girls

45% drop in peer acceptance.the other hand, saw an 88% boost. >> i'd gone through puberty before most others. >> reporter: emily was 11 yearsirst called a slut. >> knowing that people thought i was just a slut really had an effect on my self-worth. i had to cope in really harmful to myself. i turned to cutting my wrists and i attempted to commit suicide a couple of types. >> reporter: there as very r consequence when girls are ostracized, often by other girls. >> i'm worried about teenage girls and young women. >> reporter: liora is thel director of planned parenthood and the author of "i am not a slut." >> they often turn to self-drawer coping mechanisms because they can't humiliation. >> why is it important for girls to look up to diverse role models? >> girls and women need to have many role models. the kim kardashians and the inton hillary clintons.

talents, we are more than our bodies, we are more than our sexuality. but we have so much more as well. >> reporter: she created the unslut project for girls to share similar experiences and seek support. >> almost every woman i speak to about this experience with slut shaming. either the target of it or witnessed it happen to a friend at some point. the idea of a slut in our culture is that it's mutually everything else. you can't be a slut and a good mother. you can't be a slut and a successful doctor. we can overcome it and we can make the decision to not buy into it and to support each >> reporter: some stars already taking this to heart. amber rose making it clear that she will continue to support kim regardless of her ongoing feud with her husband has slut shamed me on numerous occasions. and that's why i don't particularly care for him.

>> it was very immature and corny. and it's just so far fetched and just stupid. it just didn't even really make sense. after he said that, he needs to take 30 showers after being with an apology for that. >> reporter: amber says she's not dwelling on the negativity, focusing instead on building her business with the appbased in berlin. users create an amber avatar and pair it with their own voice for messages. >> i know what i'm talking about, i know what i'm passionate want to post a naked or provocative picture, that's exactly what i'm going to do. because i don't have to make youke myself happy. up next, racing cars on ice. one group of speed demons making the most out of those brutal minnesota winters.rectile dysfunction get and keep an erection.

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we're heading to a tiny town where a group of racers is breaking all the rules. driving cars on ice on a frozen lake. rough and tumble vehicles piecedrom junkyard finds. rebecca jarvis goes home to minnesota to meet these winter weekend warriors.r: slipping and sliding like this may be your worst nightmare. but all across the country it's

this is the wild world of ice car racing. think nascar on ice. so i've come to my homeota where i've heard that in the sleepy town of laporte, winter doesn't seem to be slow coming down to ice racing, activity. even if it's just to grill. >> reporter: every icy weekend, anyone with a car and a stomach for speed can the drivers revving their engines, there's just one woman. colette houston, known to friends and family as letty. she's among the top five this season. >> it's total girl power. you just feel like so -- i don't know, pumped up. >> how does it feel to have your wife be the only woman outk? >> actually makes me proud. she's the only woman that does it, pretty cool. gives me bragging husband ryan is a police officer. >> that's the lovely work

free time on the ice. in these close quarters, doing some fishing -- >> here, fishyorter: or duking it out on the racetrack. >> follow right, follow right. other. >> yes. >> how's that? you workroubles >> we do. >> they make us start next to each other. i don't know if it's a game they play or they're testing us or r: one final race to preparations are under way. >> shake and bake, baby. >> reporter: the stakes are high. whoever wins gets bragging entire year. ryan and letty are facing fierce competition from an entire family. meet the charlie, 20-year ice racing veteran. >> not as good as new but good enough to race. i've done it off and on since 1988. i was 16 when iorter: his sons following

nathan, who's just 15. how old do you have to be to get a license in minnesota? >> 16. >> so before you license you start ice racing? >> got to have a permit. >> reporter: mom paula, official score keeper for the league -- >> take these three boltster: she's on board. >> it's about the fun, it's about the family time, it's about being with our kids, not having the cell phone, not having the television. they're learning about on ice. it's a huge, wonderful experience. >> reporter: and i'm learning on game day i may have to ignore some of the lessons of my up in minnesota i think every kid, when they get their license, is probably told by their mom, never drive onto a lake in the wintertime. and she was right. frozen lakes can be very dangerous. so before anyone steps on the ice, industrial drills are used to make sure it is thick enough. so this is thick enough?tle over two

the sheriff would not let us start racing unless we have 15 inches. free-for-all. every car must pass safety >> you've got to have a fire extinguisher in your car, got to wear a seat belt. any kids under 12 years old got to wear under 12, but not over 12? >> no. >> reporter: why not? >> i've said when this for years, everybody should have a helmet on out there. but they efore i can talk myself out of it, ryan's showing me the ropes. >> here we go! this would be the moment,ually driving on the road, that your heart would be in your throat. >> yep. >> reporter: offering up tried and true lessons for any driver a scenario. reduce your speed. >> what's the worst thing you can do on the ice? >> panic. >> reporter: tip two, go easy on the brakes. >> worst thing you can do is lock the reporter: tip three, turn

>> if your back starts sliding to the right, turn to the right and it will straighten itself ou so much. >> no problem. >> i can imagine 32 cars on that track, all spinning out like that?o feel good. in the final drivers meeting, a word of caution. >> listen up, slow down. i've seen today a lot of pits. that's how you're going to get hit or you're going to hit somebody. >> reporter: the flag drops. the racers take off. >> am i nervous? no, i just don't like the competition. charlie, cody and nathan are all in this race.tions are slushy. buddy houston quickly loses

good news for paula'sn do well in this race. that will make a difference for him in the end. >> reporter: but then in the end, the ice wins. none of our racers come out on top. >> i lost. >> yeah. >> it's very wet. >> reporter: but to this no such thing as defeat. after all, another winter is right around the corner. >> there's always next year. >> next year we'll go back at orter: for "nightline," i'm rebecca jarvis in laporte, minnesota. up next, aate so old school and focused, it was downright presidential. g out on the open road together is great... but i think women would agree, getting home... to cuddle up with their man is nice too. but here's the thing: about half of men e degree of

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is is what i came home for -- to work in the community, turning schools after hours into centers for healthcare and safe spaces for our kids. i'm p.g. sittenfeld. and a marshall scholarship, i turned down a job at google to work improving education. now i'm running for the senate to offer new ideas -- cut college loan rates in half,e gun safety laws. i approve this message to offer bold new leadership

to those keeping count at home, tonight marks the 12th republican debate of this election cycle. we've gotten used to the playground insults, vulgar n name calling from the candidates. tonight the republican field seemed poised, substantive, dare we say presidential?ater in miami or is it the calm before the storm? here's abc's david wright. >> reporter: tonight in miami, no short-fingered snipes. >> i will let himself. >> reporter: all the candidates sought to appear more presidential. >> tuesday night i didn't do as well as i wanted to and i was a little bit disappointed when i got luding trump. >> so far i cannot believe how civil it's been up here.

from the last gop debate. >> breathe, breathe. >> breathe. i know it's hard. >> when they're done with the yoga can i answer a question? >> you cannot. >> reporter: all those schoolyard taunts. >> i have a policy question for >> let's see if he answers it. >> i will, don't worry about it, marco. don't worry about it, little reporter: either bounced off or backfired. the results tuesday looked less like "house of carved s f of cards," moreinfomercial. order before midnight and get trump water, trump wine, trump magazine are. >> take one. >> reporter: if only they had a trump chia pet. jakebout statements islam hates us. >> did you mean all 1.6 billion muslims? >> i mean a lot of them.io pushed back.

of people find appeal in the things donald says because he says what people wish they could say. the problem is presidents can'they want, it has consequences here and around the world. >> marco talks about consequences. and you can be politically i don't want to be so politically correct. i like to solve problems. >> i'm not interested in being politically correct, i'm interested in being correct. >> reporter: that's about as heated as i got. rubio and hard to win their home states. cruz hoping to be the last man standing to challenge trump. >> there's some folks in washington -- >> you mean presidents. you are welcome to be president of the smithsonian. >> reporter: there were four of them on that stage -- ben carson now getting set to endorse trump. how many of them will be stillext time they debate? i'm david wright for "nightline" in new york. >> the ultimate game of elimination. thanks for watching abc news.oming up soon with overnight breaking news.

as always we're online at abcnews.com.

coming to you from hollywood, it's "comics unleashed." welcomes bruce bruce. >> bruce! >> bobby [ cheers and applause ] and now, a man who loves comedy so much he gets jokish, byron