We're a nation obsessed with thinness (yet ironically obese) and celebrity weight wars are a favorite fixation. When an actress slims down too much, we race to label her anorexic, but God forbid she gains five pounds or we'll take a picture of her bottom and magnify her cellulite on the cover of a magazine.

The following five women know the cover of a tabloid all too well, and the accompanying headline usually reads something like, "Actress Packs on Pounds" or "Starlet Suddenly Skinny."

We're not talking about celebrities who pack on the pounds or whittle their waistlines for a movie role but about those who (despite fame and fortune) just can't seem to keep their weight in check.

Think you've heard it all when it comes to celebrity weight wars? Read on for our top five celebrity yo-yo dieters.

Celeb Yo-Yo Dieter No. 5: The Lovable TV Star >>