Madonna is not known for her promptness at concert appearances. A fan sued her after she rescheduled a concert start time from 8 until 10:30, all in an effort so she wouldn't be late for that performance. So last week at a Las Vegas show, Material Mom hit the stage at midnight to a chorus of some boos. Her response is short, and so is this video. Hear how Queen Madge puts the crowd in their place.