For the second consecutive year, Lady Gaga tops the Celebs Gone Good Top 20 list, courtesy of DoSomething.org. Hot on her heels is another pop superstar, Justin Bieber, who jumps to the No. 2 spot from last year's position at No. 10, with George Clooney rounding out the top 3.
Known for supporting gay rights, AIDS and poverty, Gaga focused much of her effort in 2011 on putting an end to bullying, even bringing her fight to the White House. This year, she also set up the Born This Way Foundation, which aims to empower youth.
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