Tonight the Top 7 finalists will perform live for the nation, vying for the American Idol crown. The contestants will perform their hearts out in hopes of winning America’s vote and surviving another week.Tonight's theme is: Songs from The Great American SongbookPerforming Tonight:Katharine McPhee, Kellie Pickler,Paris Bennett, Ace Young,Chris Daughtry, Elliott Yamin, Taylor Hicks.