Jamie Foxx Apologizes To Jay-Z For Auto-Tune Vocals On 'Blame It'

Song won Grammy for Best R&B Performance by a Duo or Group With Vocals.

In a performance that could best be described as theatrical, Jamie Foxx teamed with T-Pain to deliver a rousing rendition of their hit "Blame It" after a tongue-in-cheek introduction by Robert Downey Jr.

The "Iron Man" star himself came to the stage after being introduced as "the most self-important actor of his generation." Downey then fired up the crowd for the "glory that is opera."

After a few verses of opera performed by "real" opera singers, Foxx, decked out in Union Army-like attire, appeared and got the until-then-reserved crowd on their feet.

"I ain't saying what you won't do/ But you know what we're probably gon' do/ What you been feelin' deep inside," he sang alongside a live band. "Let it out now, girl/ What you drinkin', gon' let it sink in/ Here for a weekend, thinkin' we can/ See where we could be if we press fast forward/ Just one more round and you're down, I'd know it."

Bill Clinton, Jay-Z and LL Cool J were among the many boppin' along with Foxx. And that was before he brought out a twin bill of guests: hip-hop legend Doug E. Fresh and former Guns 'N Roses guitarist Slash. Slash launched into a guitar solo of "November Rain" to end the set, flanked by Foxx and T-Pain.

Foxx, ever the entertainer, then drew a few laughs as he apologized to Jay-Z — he of "D.O.A. (Death of Auto-Tune)" fame — for his computer-aided single, which, in addition to being one of the night's best performances, also nabbed a Grammy win for Best R&B Performance by a Duo or Group With Vocals.

Stick with MTV News for our coverage of the 2010 Grammy Awards! We'll have reports on your favorite nominees, party photos, behind-the-scenes video and much more from the big show!