The farewell episode included a string of performances, with plenty getting special attention on social media including Jessica Sanchez's bombshell rendition of Celine Dion's "The Prayer," and judge Jennifer Lopez's glamorous debut of "Ain't Your Mama."
At the end of the night's performances, Paula Abdul, Randy Jackson and Simon Cowell -- the show's original judges -- made an appearance during the finale to gift Seacrest with a massive American Idol neon sign.
Original "American Idol" champion Kelly Clarkson was not able to attend the competition's farewell episode, but did appear in a pre-taped segment where she performed several of her biggest hits including "Miss Independent," "Breakaway," and "My Life Would Suck Without You."
Chris Daughter, Bo Bice, Maroulis and Caleb Johnson came together next for a rock medley, leading in to current judge Keith Urban's performance of "Stop Draggin' My Heart Around," with superstar Underwood.
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