Up on the Roof Dave Matthews performs live on Letterman's rooftop. music_matthews_dave.jpg 1 video.gif http://cgi.cbs.com/video/video.pl?url=cbs/cbs/g2demand/entertainment/mini/lateshow/music/dmb.rm&proto=rtsp&rpurl=http://www.cbs.com/latenight/lateshow/ cbs_free.gif http://cgi.cbs.com/video/video.pl?url=cbs/cbs/g2demand/entertainment/mini/lateshow/music/dmb.rm&proto=rtsp&rpurl=http://www.cbs.com/latenight/lateshow/ PLAY headline