Crystal Bowersox, last year's American Idol runner-up, will return to the popular series on Thursday (April 28). Bowersox, who lost the Idol crown to Lee DeWyze, will perform on the elimination episode, along with pop singer Bruno Mars. She released her debut album, Farmer's Daughter, in December. In related news, Stefano Langone was eliminated from the series this week. The six remaining contestants will sing the music of Carole King on Wednesday's (April 27) episode.