During a recent trip to New York, Justin Vernon bka Bon Iver stopped by 30 Rock to visit the set of Late Night with Jimmy Fallon. Along with The Roots, Vernon performed an extended version of “Perth” for the studio audience before the show’s official taping began. Today, the web-savvy folks at Late Night have unleashed the over-eight minute gem just in time for The Grammys, for which Bon Iver has four nominations.