Fall Out Boy have donated $50,000 towards a campaign that is against a proposition that Californian voters will be faced with this November.
Proposition 8, which states "only marriage between a man and a woman is valid or recognized in California, would eliminate the right of same-sex couples to marry in California.
Other celebs have spoken out about this proposition, including Governor Arnold Schwarzenegger, Senator Barack Obama and celebrities like Brad Pitt and Steven Spielberg.
