Beyoncé

Beyoncé went on a liquid diet, and lost 20 pounds for her role in the upcoming movie Dreamgirls -- but purposely put it back on again after filming was done! "Now I'm back to my body," she told Britain's GMTV morning show. "I'm very conscious of being a curvy woman, and I'm very happy that I'm a curvy woman."

The sexy songstress also does not advocate liquid dieting. Though you lose weight "really fast" on a liquid diet, "I would not recommend it if someone wasn't doing a movie because there are other [healthier] ways to lose weight. It was strictly for the movie," she says.

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