This Sunday, Eau Claire's Bon Iver are up for 4 Grammys, but unfortunately the band will not be performing due to some earlier controversy. However, last week Bon Iver performed on Saturday Night Live, and most recently, Bon Iver jammed out with Questlove and The Roots on Late Night With Jimmy Fallon.  Justin Vernon performed the track "Perth" and the performance was became a very soulful 8 minute jam. At the 4 minute mark, check out the nice break down. Then at the 5 minute mark the music begins to sound a little like D'Angelo's classic ballad "Untitled." (or that could be just me)  Watch the video below and let us know what you think.