19x25 - Late Show with David Letterman

Dave welcomes actress Reese Witherspoon, a Top Ten List with 10 of the 2012 Sports Illustrated Swimsuit models and the reveal of the 2012 cover model, actor Michael Weatherly from the CBS drama series "NCIS", and musical guests Kasabian. Top Ten Reasons This Year's 'Sports Illustrated' Swimsuit Issue Is The Best One Ever.