Watch: Mariah Carey, Jennifer Lopez & Psy Perform at 'American Idol' Season 12 Finale

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Mariah Carey, Jennifer Lopez and Psy were the hightlight 'star' performers at the American Idol Season 12 Grand Finale on May 16. The Fox talent show crowned Candice Glover as its new winner that night, aftering beating out Kree Harrison in number of votes. Watch the videos of the pop divas, and the K-pop rapper's performances below!

Queen Mariah performed a hits medley that included featured "Vision Of Love", "Make It Happen", "My All", "Hero", "We Belong Together" and her brand new #1 (R&B) single "#Beautiful" featuring Miguel. She was excellent! Next, Latin diva Jennifer Lopez delivered the first television performance of her new club banger, "Live It Up", produced by who other than RedOne, and featuring Pitbull. J.Lo murdered that stage! Mariah could've shown just a little more respect to Jennifer's rocking performance with a standing O but whatever. And finally, Korean pop-rap sensation Psy made everyone at the Nokia Theatre L.A. Live and at home watching FOX had a great time with an energetic performance of "Gentleman". By the way, Mariah was not sitted on the panel 'cause she was getting ready for her own performance, it's not that she left her seat 'cause couldn't stand Psy's music, lol.

Who had the best performance?

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