When introducing herself Madonna said that she was born and raised in Detroit, MIchigan. Madonna was actually born in Bay City, which is 190 km away from Detroit. Her high school however was in Metro Detroit.
Madonna's step mother, whom her father married after her mothers death, was named Joan Gustafson, not Bette.
Before Madonna left for Paris to become an international singer Paul mentioned that Madonna hates singing. This is very unlikely since before leaving she was a member of the band "Breakfast Club" where she was also a singer.