Last night The Barr Brothers made their second appearance on The Late Show with David Letterman, performing “Even The Darkness Has Arms” from their latest album Sleeping Operator. The Relix favorites (or perhaps that should that be favourites, since the New England siblings are now based in Montreal) swapped in for Hundred Waters, who were trapped in the upstate New YorkSnowmageddon. Watch their performance below and then check out our interview with Brad Barr on their new release (as well as The Slip, Surprise Me Mr. Davis and more).