Bon Iver’s Justin Vernon turned ’22 (OVER S∞∞N)’ into a voter registration PSA during an appearance on US late night TV.The musician performed the track, which appeared on his last album ’22, A Million’, on The Late Show with Stephen Colbert last night (September 24).Sat behind a series of synths and with a guitar on his lap, Vernon extended the track from nearly three minutes to just under six minutes, injecting new audio samples into the song.