Kelly Clarkson

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Kelly might still be slinging cocktails if it weren't for the persistence of her good friend Jessica, who begged her to audition for the first season of American Idol. Before the audition, Kelly jokingly told her friend that if she won, she'd buy Jessica her dream car. And she did!

"It was so exciting," Kelly says about the moment she showed up at Jessica's house with the car. "She flipped out. She was like, 'You weren't really supposed to do that!'"

Although she may be "Miss Independent," Kelly still depends on her friends and family to help her deal with instant celebrity status.

"I have a good support system," Kelly says. "I've been with my band for three years, and my family and friends are awesome. So I think it's really that—just having people that keep you real and, you know, you can just chat with."