On tonight’s exciting performance show, the last of the season, Taylor Hicks & Katharine McPhee will battle it out live at the famed Kodak Theatre in Hollywood. One will be the next American Idol and one will go home. This week's theme: Songs from... (more) previous episodes & Kat & Taylor's debut singles. Performing tonight: Taylor Hicks and Katharine McPhee.

Ben Stiller, Brad Hicks, Chris Daughtry, Christina Applegate, Dan McPhee, Daniel Powter, Linda Hicks, Mandy Moore, Peisha McPhee, Sasha Cohen