Last night was Grizzly Bear's time to shine as part of Stephen Colbert's StePhest Colbchella '012 RocktAugustfest, and the group showed up to play three songs. Also, they did a highly entertaining interview with Stephen aboard the Intrepid, so don't miss that. Watch performances of "Two Weeks," "Sleeping Ute," "Yet Again" and the interview below. "Two Weeks" "Sleeping Ute" "Yet ...