iTunes will be offering exclusive video and audio downloads of performances from the two-night American Idol special "Idol Gives Back."

Performers include Kelly Clarkson; Gwen Stefani: Earth, Wind & Fire; Josh Groban with the African Children's Choir; Jack Black; Rascal Flatts; Quincy Jones; Carrie Underwood; Annie Lennox and others. The special is designed to raise funds for children living in extreme poverty in the both the U.S. and Africa.

Proceeds from all iTunes sales of the performances, available Thursday, will be donated to relief organizations.