Check out the ways A-listers like Brad Pitt and Christina Aguilera give back
Last year, PETA sent the Step Up star a video of exotic animals being skinned. "It was so horrible -- I cried within 10 seconds," she tells Us. By this summer, Dewan had stripped for a new PETA campaign. "I grew up as a dancer, so I've never really been that modest," Dewan says.