The 55-year-old star apparently referred someone else as her driver while exiting a Hollywood Pilates studio, reported Showbiz spy.
"Madonna came out of a Hollywood Pilates studio and reportedly spotted someone across the street thinking him as her driver. When the man did not notice her, she yelled at him," said an eyewitness.
"The guy shouted back and said, 'Lady, I don't know who you think I am, but I'm not your driver!... And this is not your car!," the eyewitness added.