12/29/2011 09:19 am ET Updated Dec 29, 2011

Justin Bieber, Lady Gaga Top List Of 11 Most Inspiring Celebrity Activists Of 2011 (SLIDESHOW)

When A-list celebrities throw their names behind a noteworthy -- but underrepresented -- cause, they're able to push it to the front of the world's stage to get the much-needed attention and support it never would have garnered otherwise. Whether they're bringing clean water to developing countries, pushing for stricter bullying laws, or demanding world leaders help end the famine in Africa, our top 11 celebrity activists of 2011 have each dared to speak up and out on behalf of those who can't advocate for themselves.

What do you think of the picks? Tell us in the comments below.


Most Charitable Celebs