Published Friday, 26 October 2012
The rocker was visiting a storage building he owned on the Sunset Strip in Los Angeles with his young daughter Kimberly when he was approached by a man who demanded the keys to his sportscar.
He tells news show Access Hollywood: "He said, 'Put your hands up...' and I gave him the keys."
Stewart was happy to see the gunman leave and quickly made sure his daughter was OK - but he soon returned.
The singer recalls: "He came back in (and said), 'I can't start the car,' so at gunpoint, I had to walk out on a side street... with a gun in my back and get in the car and start it for him. It started on a button."