Tonight the Top 9 finalists will perform live for the nation, vying for the American Idol crown. The contestants will sing their hearts out tonight to the theme of country music in hopes of winning America’s vote and surviving another week in the competition.This Week's Theme is: Country MusicPerforming Tonight is:Katharine McPhee, Kellie Pickler,Mandisa,Paris Bennett, Ace Young,Bucky Covington,Chris Daughtry, Elliott Yamin,Taylor Hicks,