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25 Shocking Celebrity Weight Changes

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

Credit: Getty Images/Sipa

17 of 27

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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