PHOTOS: George Clooney, Bono, celebrities and their causes
Actor, director and all-around hunk George Clooney testified on Capitol Hill Wednesday about the humanitarian crisis in Sudan. D.C. is increasingly becoming a home away from home for some celebrities, as they lobby on behalf of their causes. Take a look at the top socially aware and active celebrities and their causes.
Silverstone is an avid animal rights activist. Based on her activism, she became a vegan in 1998 and has also modeled in ads for PETA.