01/12/2011 02:13 pm ET Updated May 25, 2011

Vampire Weekend & The Black Keys Have A 'Sell-Out Off' For Colbert's Grammy Vote (VIDEO)

After winning a Grammy last year for his Christmas album, Stephen Colbert now has the distinct honor of voting on this year's Grammy nominees. On last night's "Report," Colbert made his final decisions but was stumped when he got to the "best alternative rock album" category.

After ruling out Band Of Horses and Arcade Fire (they were on "The Daily Show," after all) Colbert had to decide between popular indie bands Vampire Weekend and The Black Keys.

As Colbert points out, "best album" used to be easy to choose just by looking at which album made the most money. But now, since no one buys albums anymore, Colbert knew the only way to decide was to have a "Sell-Out Off."

Dan Auerbach and Patrick Carney of The Black Keys and Ezra Koenig of Vampire Weekend joined Colbert at his desk for a competition based on which band had more songs featured in commercials last year.

Watch the clip below to see this epic battle unfold.