The 33-year-old Season 1 winner and 33-year-old Season 4 champ will perform on the Fox reality competition's Season 15 finale on April 7. The long-running series will crown a final winner the same evening.
The finale will be preceded by the 90-minute special American Idol: American Dream on April 5. The special will see host Ryan Seacrest, original judges Simon Cowell, Paula Abdul and Randy Jackson, and former contestants share memories of their time on the show.
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