American Idol - What2Watch

On the eve of the ABC incarnation of the contest completing its first season, the remaining finalists present the last performances on which they'll be judged in this episode. Luke Bryan, Katy Perry and Lionel Richie – and, of course, viewers across the U.S. – then will get their say on who should be declared the next "American Idol" in the finale Monday. Ryan Seacrest is the host.