19x127 - Late Show with David Letterman

Dave welcomes actor Steve Martin and musical guest Gotye. Pat Farmer with a question; Slow News Day; What did Dave do during the Emmys; New Books, a Top Ten list; and the recipient of the Steve Martin Prize for Excellence in Banjo and bluegrass, Mark Johnson. TOP TEN: LEAST POPULAR SNACKS Steve is here to perform with year's winner of the annual Steve Martin Prize For Excellence in Banjo and Bluegrass. Dave welcomes the world's richest man, Mexican business magnate with a net worth of 69 billion dollars, Carlos Slim. GOTYE: from his album, "Making Mirrors," the singer from Australia performed "Eyes Wide Open".