Yes, the Material Girl and the girl known for unusual material - singer and strange style icon Lady Gaga - had a hair-pulling, name-calling catfight... but it was all in the name of comedy. Madonna was one of a number of surprise guests on this week's 'Saturday Night Live,' during which Lady Gaga performed as the scheduled musical act. The two popped up at the end of recurring sketch 'Deep House Dish,' dressed in matching black lingerie. Watch their staged battle: