Lady Gaga ranked at number four, thanks in no small part to her Born This Way Foundation
, which combats bullying and promotes acceptance of the LGBT community. Gaga also pledged $1 million to Hurricane Sandy relief efforts. Rounding out the top 5 was Justin Bieber. His Believe Charity Drive
raised over $1 million for charity, while he also works with Pencils of Promise
to build schools in third-world countries, visits young cancer patients and donated $100,000 so homeless kids could go to school.