There has been plenty of speculation about how, exactly, Angelina Jolie got her body back into such amazing shape so quickly after giving birth to twins, Knox and Vivienne. Did she have surgery? Or was it through diet? Most recently, the story is that she's getting in shape by doing Pilates using the kids' Nintendo DS.

"Let's Pilates" is a game in which you -- you guessed it -- do Pilates. There are ways to customize the workout and reportedly, Angelina is already on the toughest level. By following the routines for an hour, three times a week, Angelina has quickly regained her pre-baby body.

Angie's not the only celeb who's found Pilates to be a fabulously effective workout. Check out the gallery below to see which other stars have a body by Pilates.