Exclusive: Green Day To Perform At Idol Finale

Green Day will be the surprise guest on American Idol's star-studded grand finale, airing Wednesday night, May 23, an Idol insider tells Star. The band will be the last act of the night, following Smokey Robinson, Tony Bennett, Aerosmith guitarist Joe Perry and Gladys Knight. American Idol alumni Kelly Clarkson, Carrie Underwood, and last year's winner Taylor Hicks will also perform.