Some stars are known for their public weight fluctuations
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TV personality Oprah Winfrey (L) and actress/singer Jennifer Hudson arrive at the MGM premiere of 'The Great Debaters' held at the Arclight Cinerama Dome on December 11, 2007 in Los Angeles, California.
Yo-yo dieting is rampant in Hollywood: Some of our favorite stars regularly dip from size 10 to 4 and back, and flashbulbs capture every bulge and muffin top. The health risks of yo-yo dieting haven't been settled, but what's crystalline is that it's a vicious cycle with emotional consequences—like an overwhelming sense of failure. Here's a sampling of celebrities who have yo-yo dieted with the public looking on.

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