The NFL sued rapper M.I.A. for 100% of her earnings for life (if she ever earned over $2 million) because she flipped everyone off during the 2012 Super Bowl halftime show. The lawsuit was later settled for an undisclosed sum. – WTF Fun Facts
Source: The NFL Once Sued Rapper M.I.A. for Over $16 Million Because of a Lewd Gesture (sportscasting.com)