Brad Pitt is just one of the superstars set to appear on American Idol's benefit show, Idol Gives Back, this week. The event, which raises money for charities that aid children living in povertyand last year raised more than $75 million!will also feature Bono, Reese Witherspoon, Robin Williams, Miley Cyrus, Mariah Carey, Carrie Underwood, and John Legend. Pitt is well-known for his philanthropic endeavors: He and partner Angelina Jolie donated more than $8 million to charity in 2006, and in 2007 he launched Make It Right, a national campaign to help the people of New Orleans recover after the devastation of Hurricane Katrina. The father-of-four plans to build 150 new houses in the most affected areas of the city, and Idol Gives Back will helpMake It Right is one of the five charities to benefit from the proceeds of the show. To make a donation to Idol Gives Back, click here.