Tonight the Top 12 finalists perform live for the nation, vying for the American Idol crown. In this special two-hour show, the contestants will sing their hearts out in hopes of winning America's vote and surviving another week in the competition. Tune in to see who impresses the judges and who buckles under the pressure.Tonight's Theme Is: Lennon/ / McCartney songsPerforming Tonight are:David ArchuletaJason CastroDavid CookKristy Lee CookChikezie EzeDavid HernandezMichael JohnsRamiele MalubaySyesha MercadoAmanda OvermyerCarly SmithsonBrooke White