Last night, bewilderingly popular L.A. synthpoppers Foster The People turned up on the Late Show With David Letterman. As it turns out, they have songs other than "Pumped Up Kicks." One of them is called "Helena Beat," and that's the one they played. Watch it below. [videoembed size="full_width" alignment="center"][/videoembed] The band's album Torches is out now on Columbia.