Putting their money where their mouths are! In addition to walking the red carpet and living the glamorous life, these celebrities, including Angelina Jolie, Lauren Conrad, and Matt Damon, are working hard to make the world a better place. Read up on their charities!
The supermodel visited Kenya in January 2012 as part of her duty as a United Nations Environment Programme Goodwill Ambassador. "When I went to Africa I discovered that elephants are one of the smartest and most complex mammals on earth. If we don't protect them, they can be extinguished," Bundchen later said.