Madonna On American Idol Tonight

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Madonna is one of the many celebs that will appear on tonight’s “Idol Gives Back” charity special. The pop icon was added this morning as 'American Idol' executive producer Nigel Lythgoe announced on Ryan Seacrest's KIIS-FM radio show.

"I'm gonna blow [a secret] now: Madonna came on board yesterday," said Lythgoe. "And that is just fantastic."

The charity special will be a two-hour long show benefiting African and American children in need.

Others set to appear in the special include Bono, Ellen DeGeneres, Celine Dion, Hugh Grant, Rascal Flatts, Gwen Stefani, Earth, Wind & Fire, Il Divo, Keira Knightley, Josh Groban with the African Children's Choir, Jack Black, Helen Mirren, Quincy Jones, Annie Lennox and past "Idol" winners Kelly Clarkson and Carrie Underwood.