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WJLA, March 14, 2012

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.

Sean Penn

Penn has championed natural disaster relief. He famously devoted himself to the relief efforts following Hurricane Katrina as well as the earthquakes that devastated Haiti.