On May 10, season 7 winner David Cook will debut his brand new song, "The Last Song I'll Ever Write For You," and Idol judge Jennifer Lopez will sing her hit, "Dance Again."
Singer Adam Lambert, who appeared in the L.A. production of the musical Wicked, and who gained international fame during his appearance on season 8, will appear on May 17, performing "Never Close My Eyes." In addition, Lisa Marie Presley will perform on the episode.
The series, which concludes its season on Wednesday, May 23, is hosted by Ryan Seacrest, and alsofeatures Randy Jackson and Steven Tyler as judges.
Don't show this again.