Rebel's Fat Contract

Rebel recently revealed that her contract for Pitch Perfect forced her to stay fat. Rebel said because of her character "Fat Amy" she was prohibited from losing weight saying "You can't lose, I think it's not more than 10 pounds, or gain more than 10 pounds. Yeah, you have to kind of stay at the weight. It's in your contract." Are you telling me, with all the stories of actresses being forced to lose weight to be in movies floating around, that she somehow was contractually obligated to stay fat?