Kirstie Alley, the ultimate yo-yo-er, just announced another turn in her diet saga: 50 pounds shed. For some celebs, including Britney Spears, Tyra Banks, and 11 others, the battle of the bulge never ends.
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Tyra Banks
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Kirstie Alley
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Britney Spears
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Oprah
Astrid Stawiarz / Getty Images; Michael Loccisano / Getty Images
Katherine Heigl
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Lindsay Lohan
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Beyonce
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Jessica Simpson
Kevin Mazur, WireImage / Getty Images; Evan Agostini / AP Photo
Chris Christie
Bill Clinton
John Travolta
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