While greeting fans outside the stage door of her Broadway show Call Me Izzy, Jean Smart left her mark on one lucky fan, by request. In a now-viral Instagram video posted Friday, a fan asked the Emmy-winning actress to sign her arm with the full name "Deborah Vance" explaining that she planned to get it permanently inked as a tattoo. "You're gonna what?" Smart responded with astonishment. "Are you serious?" When the …