Bon Iver + the Roots Turn 'Perth' Into an Eight-Minute Jam on 'Fallon'

Well, this is surprising. Bon Iver's Justin Vernon, the man who could not give a flying expletive about the Grammys, stopped by the 'Late Night With Jimmy Fallon' studio to jam with the Roots on 'Perth,' the opening track from his most recent album.

The all-star collaboration transformed the quiet torch song into a vibed-out, epic slow jam that lasted for eight minutes. Seriously, this would not have been out of place on some late-90s R&B station.

Bon Iver are up for four Grammys this Sunday, including Song of the Year and Best New Artist even though, you know, they don't care about them.

Watch Justin Vernon and the Roots Perform 'Perth'

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