Lauren Conrad: Entrepreneur and TheLittleMarket.com Co-Founder

Lauren Conrad ended up on one of the world's first major reality TV shows at the tender age of 17. Since then, she's grown into the cunning, experienced entrepreneur you know today. According to her, she wouldn't be where she is now—a New York Times best-selling author eight times over, designer of her own fashion line LC Lauren Conrad for Kohl's, and philanthropist behind the non-profit The Little Market—without the mistakes she made along the way. “I believe in mistakes," she tells Hillary Kerr on episode 19 of Second Life. "I think that everything I know is because of a mistake I made.”