David Cook Photo

From: Photo Flash: AMERICAN IDOL's Top 11; David Cook & Ke$ha Perform!

It is now down to 11 'American Idol' hopefuls as another contestant, Lacey Brown, was eliminated during the results show that aired last night, Wednesday, March 17th. American Idol season 7 winner David Cook made an appearance and sang the Rolling Stones hit 'Jumpin' Jack Flash' and guest performer Ke$sha took to the stage to sing her hit 'Blah Blah Blah'.