New York indie rockers (and friends of Noisevox) The Pains of Being Pure at Heart stopped by "Late Night with David Letterman" on Tuesday to play "Heart In Your Heartbreak" from upcoming second LP Belong (Slumberland). It's a tight rendition, and that crunching, fuzzed-out bridge just after the two-minute mark sounds especially great. Watch below, courtesy of The Audio Perv.