Because you're comparing a televised audience to a live one. People do not watch the Super Bowl for the half time show.
Exactly, thank you for proving that the tickets are for the Grand Prix and not Rihanna's show.
I mean, I bet it's amazing for Rihanna to perform in front of so many people, but she and her fans should understand that any of the pop girls can perform at an event that draws in 100,000 if their label sets it up for them. It's just that some pop girls don't need to perform at places like this and Rock In Rio in order to boost their audience count because they can do it on their own.
Rihanna is the only one with the hits
and perhaps Madonna, I mean her SB half time show was the most watched in US tv history so she could be an option as well.