Best of 2007

21 & Under: Hottest Breakout Stars

Zac! Rihanna! Shia! Lauren! These kids aren't only the most popular, they're also the most likely to get bigger in '08. By Aaron Parsley


When this Laguna Beach alum packed up and moved to Hollywood with a reality camera crew in tow, Lauren Conrad's 15 minutes could've run out fast. But when the 21-year-old It girl with the enviable wardrobe and relatable social life turned The Hills into a screaming match with nemesis Heidi Montag ("You're a bad person!"), you couldn't help but pick a side and watch her every text message.