News: Ke$ha performing on American Idol next week

American Idol season 7 winner David Cook and pop starlet Ke$ha are set to perform on “Idol’s” results show next week...
Ke$ha’s announcement was a little more, uh, succinct: “Party time american idol woot t minus 3 dayz.”...
The top 12 will sing Rolling Stones songs on Tuesday, and one of them will go home after watching Cook, Orianthi and Ke$ha do their thing on Wednesday.