Why Is The NFL Asking Rihanna And Katy Perry For Money?

The NFL has reportedly asked potential super Bowl halftime performers to contribute to the league for their performance.

Source: http://www.mtv.com/news/1904304/why-is-the-nfl-asking-rihanna-and-katy-perry-for-money/

Amy Cobb Michelle Behennah Veronika Vaekovб Paulina Rubio