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'American Idol': Season 5's Ace Young Proposes to Season 3's Diana DeGarmo On Finale Stage

After a live proposal, set up by host Ryan Seacrest, the "Idol" couple who recently moved in together is heading to the altar.

Ace Young Diana Degarmo proposal Idol finale P
Michael Becker / FOX

American Idol  power couple Ace Young and Diana DeGargmo made it official on tonight’s Season 11 finale broadcast.

A visibly nervous and long-haired Young popped the question to his unsuspecting significant other in one of the most romantic moments in Idol history.

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"Diana -- we have conquered Broadway together; we have created all your new music together,” Young said to a teary-eyed DeGarmo, who came in second on season 3. “ We have an amazing group of people around us, and, with the help of David Webb Jewelry, I have a way to make this fun last forever."

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“You’re my best friend,” Young, who competed on season 5, told a teary-eyed DeGarmo as he dropped to one knee. “I want to make this last forever, and I will do everything in my power to have the most imaginable amazing life together.”

Watch Ace and Diana talk about how they found love after Idol on the May 4 episode of THR’s original web show Idol Hangover below: