Play of the Day -- Late night bids adieu to Jon Huntsman ... and more

Jon Huntsman bowed out of the Republican presidential race, but that's not the only reason he's having a tough week. "Earlier this week, he found out he was not really a Kardashian," David Letterman joked on Monday. Don't miss today's Must See Moment at 0:24, when Letterman presents a preview for Oprah's interview with New Jersey Gov. Chris Christie.