ANNA KENDRICK WOWS DAVID LETTERMAN WITH ‘CUP TRICK’

Anna Kendrick stopped by The Late Show With David Letterman Friday to talk about her new flick, "Pitch Perfect" but she ended up wowing the longtime talk show host with her "cup trick" instead.  We're sure David Letterman has seen it all by this point, so it's a lot of fun to watch him get so excited about Anna's cup trick and to see him question whether or not the Oscar-nominated actress has low self-esteem.