just like k acharl. >> karl lagerfeld? >> he's a fashion designer. he's really fashionable. am too. >> reporter: and we were there as haley sashayed down the runway in new york's fashion week. joined by other pint-sized prodigies taking the fashion world by storm. after the show, she gave me a lesson in fashion. tell me what you're wearing. very stylish. >> what i am wearing is gucci. >> whoa. i'm wearing j. crew. >> j. crew? where to the jeans come from? >> the jeans, they weren't supposed to see them, i was cold so i put them on. i'm not trying to make a fashion statement. it's because it was 10 degrees in new york today. i was hoping nobody would notice. it's probably a bad choice for a fashion show, huh? >> yeah. you should probably wear like shorts. >> reporter: but the free world of social media stardom can come with a price. potentially exposing kids to dangers. raising questions about privacy and oversharing. >> did you have 100,000 followers, parents have to ask themselves, are all of these people good-intentioned? people can develop a scary obsession with your chil