Carrie Underwood, who we all know got her start on American Idol, returned to the show and she did not disappoint. Not only did she perform on the show, she mentored the finalists and got to watch them perform some of her most famous songs. Which by the way, sounds terrifying to do. All 5 finalists took the stage last night with 2 contestants being eliminated leading to the finale. See their solo performances, and their group performance with Carrie herself here.