An award given to magician David Copperfield disappeared into thin air, the old-fashioned way, from his Midtown penthouse. Copperfield recently received a “King of Magic” honor, bestowed by the Society of American Magicians, at a reception at his apartment. After an evening of toasts, cake and champagne to celebrate — with guests including Roberto Cavalli, Owen Wilson, Robert Verdi, Michael Michele, Blaine Trump, Peter Brant and Michael Stipe — Copperfield followed the crowd out the door and enjoyed a late dinner on the town. But when he got back home — presto chango! — he discovered his front door was wide open, and the cherished plaque was nowhere to be found. The magic man is now offering a $50,000 reward for its safe return. (We’re not pointing any fingers, but REM did break up a few days later … Maybe Stipe’s going underground?) The shindig at Copperfield’s home was also to celebrate his cover shoot for Fantastic Man magazine.