Since the 1980s, Kirstie's weight has fluctuated more times than we can count. Recently she became a spokeswoman for Jennie Craig and reportedly lost 70 pounds on the diet program. However, her new TV series, "Kirstie Alley's Big Life" (emphasis on BIG), clearly showed that she wasn't able to keep it off.

This isn't the first time that Kirstie's ballooning weight has been the butt of the joke. In 2005 (before the diet contract) she starred in a satirical "reality" show called "Fat Actress."

oprah

No. 1: Oprah Winfrey

She may be one of the wealthiest celebrities and the most successful woman in daytime television, but Oprah's many accomplishments and charitable acts are often overshadowed by her ever-fluctuating waistline.

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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