American Idol - Season 5 Episode 20 Grand Finale Heading back to where it all began.
Overview: The top three perform, and a winner is chosen; guest performers include Carrie Underwood, James Arthur, Sara Bareilles, Gabby Barrett, Michael Bublé, Deana Carter, Earth, Wind & Fire, Melissa Etheridge, Flo Rida, Ben Platt and more.