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Matthew McConaughey, Mila Kunis, Oprah Winfrey

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These stars got candid and spilled the beans about a hush-hush topic—their weight!

Oprah Winfrey opened up about the struggles she has had with her weight for the past decade. Celebs such Bethenny Frankel and Tori Spelling dispelled rumors surrounding their figures, while stars such as Mark Wahlberg, Mila Kunis and rapper 50 Cent reveal just how much weight they lost for their roles on the big screen.

Get the details on the drastic weight loss Texas native Matthew McConaughey underwent for his role in the film Dallas Buyers Club. It was more than a 50-pound slimdown!

Find out which stars bulked up or slimmed down for their roles in films and see how much your favorite celebs tip in at as they reveal their weights.