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The Fit 5: Tips to Feel (and Look) Like a Star!

From Kim Kardashian's cellulite challenge to Adriana Lima's pregnancy workout, get the scoop on how to look fab like the stars


Though she helps contestants on The Biggest Loser to work as a weight-loss team, tough-love trainer Jillian Michaels prefers the solitary aspect of martial arts to stay in shape. "I'm forced to learn new things and I find it challenging," she says of favorite practices including Brazilian Jiu-Jitsu and Aikido. "I'm not a team sport girl. I hate to lose – I'm the most competitive person in the world, and I can't stand not being in control." – Christina Yoon

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