Ace Young proposes to Diana DeGarmo on "American Idol" finale

AMERICAN IDOL: Idol Finalists Ace Young has a special question to propose to Diane DeGarmo during the season 11 AMERICAN IDOL GRAND FINALE at the Nokia Theatre on Weds. May 23, 2012 in Los Angeles, California. CR: Michael Becker/FOX
Ace Young proposes to Diana DeGarmo during the "American Idol" finale on May 23, 2012, in Los Angeles.

(CBS News) Two former "American Idol" competitors returned to the stage during Wednesday's season finale, but not for the reason you'd expect.

Season five finalist Ace Young and season three runner-up Diana DeGarmo didn't sing for viewers - instead, they got engaged during the live show.

Pictures: The "American Idol" finale
Pictures: Celebrity weddings and engagements
Complete Coverage: "American Idol"

Before Phillip Phillips was declared this season's winner, "Idol" host Ryan Seacrest called the couple to the stage.

The lights were dimmed, and Young, 31, said, "This has always been home to us and I felt that this would be the perfect place to ask a simple question."

He then got down on one knee, and continued, "We have conquered Broadway together. We have created our new music together. We have an amazing group of people around us. And with the help of David Webb jewelry, I have a way to make this last forever. Are you ready?

"I love you to death. You're my best friend. I want to make this last forever and I will do anything in my power to have the most ... amazing life together if you will have me. Diana Nicole DeGarmo, will you marry me?"

A tearful DeGarmo, 24, said yes.

The "Idol" competitors met in the spring of 2010, when they both appeared in the Broadway revival of the musical "Hair."