LOS ANGELES (TheWrap.com) - Bill Murray was so fired up about David Letterman's 30th anniversary of the "Late Show" Tuesday that he nearly started a blaze lighting a cupcake in honor of the big day. Murray, who was Letterman's first guest on "Late Night With David Letterman" on February 1, 1982, brought out a gift-wrapped box, which, when Letterman lifted it, revealed a cupcake with 30 candles. ...