25 Shocking Celebrity Weight Changes

A look at fad diets celebrities have used to shed or gain weight fast.

Credit: Getty Images/Sipa

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Seth Rogen

Since first gracing the silver screen, funny guy Seth Rogen has slimmed down significantly by working out with trainer to the stars Harley Pasternak.

The 31-year-old ditched around 30 pounds in nine months.

Next: Renee Zellweger

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