Crystal Bowersox and Lee DeWyze Perform 'Falling Slowly' on 'American Idol'

The judges agreed that the evening's two duets, "Falling Slowly" by Crystal Bowersox and Lee Dewyze and "Have You Ever Really Loved a Woman" by Michael Lynche and Casey James, were better than the contestants' solo performances.

And there's not much question that Crystal and Lee's dueling-guitar version of the Oscar-winning "Once" tune originally sung by Glen Hansard and Markéta Irglová shined the brightest.

The judges wholeheartedly agreed. Randy Jackson said, "Great song by two great singers!" Ellen chimed in, "You're the new Captain and Tenille." Kara agreed, "One of my favorite moments of the entire season. You brought out the best in both of you, that's what duets are about," and Simon even heaped praise, saying, "I wouldn't call that good, I'd call it fantastic."

Vocally, Crystal and Lee's take was as strong as Allen's in a few places -- with Lee slightly edging out the lone female standing -- and this was easily the strongest number of the night. As we're sure the "Idol" producers intended, this collaboration made it clear why virtually every "Idol" watcher is picking these two for the finale.