NPR Music asked rapper T-Pain to perform for one of their infamous Tiny Desk Concerts. The Tiny Desk Concerts are (very) intimate gigs filmed in the NPR offices, with just a couple of people watching.

The rapper took NPR up on their challenge and appeared with nothing but keyboard player Toro and his own, real singing voice. He starts off visibly shy, and admits: “This is weird as hell for me… Never done anything like this. Many were shocked at his stripped-down vocals.

T played his most famous songs, like “Buy You A Drank” and “Up Down (Do This All Day),” but he did it without all the production, sitting on a stool next to, well, a tiny desk. And if you’re surprised by how impressive his singing is, you’re not the only one. Fans went berserk over the clip, and tweeted their awe. You could say that it was the revelation of the millennium.

Pain’s acoustic performance was revealed one day he made comments about Kanye West’s Auto-Tune use. “Kanye uses it, but he doesn’t use it correctly,” the singer told “HuffPost Live.” “He makes great music with it, but the way that I use it and the way that I’ve shown Chris [Brown] and Jamie [Foxx] to use it, he doesn’t use it that way.”

T-Pain will be releasing a greatest hits album called T-Pain Presents Happy Hour: The Greatest Hits on Tuesday.