7 Shocking Celebrity Weight Changes

A hand adjusting a weight scale(BlackDoctor.org) — Whether they’re slimming down to play a perfectionist ballerina or bulking up to a gladiator-esque stature, celebrities often need to change their shape drastically—and on short notice—to ace roles (or meet the expectations of a critical public).

The problem? This type of dieting can be bad for your health. Crash diets can weaken your immune system, leaving you more vulnerable to getting sick and may even hurt your heart. Fast weight gain can be bad news too, particularly for the heart and joints.

Healthy or not, here’s a look at some of the most dramatic transformations.