Tonight the Top 12 finalists perform live for the nation, vying for the American Idol crown. In this special two-hour show, contestants will sing their hearts out in hopes of winning America’s vote and surviving another week in the competiton. Tonights theme: Stevie Wonder Hits. Performing tonight: Katharine McPhee, Kellie Pickler, Lisa Tucker, Mandisa, Melissa McGhee, Paris Bennett, Ace Young, Bucky Covington, Chris Daughtry, Elliott Yamin, Kevin Covais, and Taylor Hicks.