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!
"We're at a critical point in the fight against AIDS and we need to act now," 90210's McCord says, pledging to support ONE's efforts to end mother-to-child transmission of HIV, increase the number of people on HIV treatments to 15 million annually and reduce new HIV infections. "ONE's goals are ambitious, but they are absolutely achievable if we all do our part."