Over the years, Oprah has ballooned from average to obese, and then whittled her way down to slim and trim, only to gain it all back again.

This former daytime diva has been very open about her struggles with food and weight, frequently talking about her experiences on her show and in her magazine. No doubt she's helped hundreds or even thousands of Americans trim down, thanks to the diet secrets she's shared, but on a personal level she just can't seem to win the battle.

Whether you feel pity or disdain for these celebrity yo-yo dieters, we're quite certain this won't be the last you hear about their weight wars.

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