'American Idol': Adam Lambert performs 'If I Had You' on 'Ellen'
But first, the former "American Idol" finalist discusses his photo shoot for People's Most Beautiful People issue ("That's not my cockatoo") and revisiting the show that made him famous.
Lambert admits he was surprised he was asked back to mentor this season's crop of singers and goes on to say nice things about them.
Then he busted out the dance moves, vocals and star quality that got him the fame in the first place. "If I Had You" has a sort of retro feel to it, but updated, if that makes any sense.
Check out the interview and performance:
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Photo credit: Ellen