Josh Duhamel/Ken Jennings/Jason Mraz

JOSH DUHAMEL drops in to chat about his hit NBC Monday night drama, ""Las Vegas"" and about going back to his modeling roots. Singer/songwriter JASON MRAZ (originally scheduled to appear on Friday) performs ""You and I Both"" from his new live CD ""Tonight, Not Again."" Plus, he's ""Jeopardy's"" all time money winner…who is KEN JENNINGS stops by to discuss the rumors of his reported loss on the hit game show.