If Black Eyed Peas could do it, then Rihanna definitely can do it. She has a catalog of hits able to sustain for 12 mins. I think people think she isn't capable since she can't dance but you don't have to be a dancer to do the Superbowl.
For female divas, Diana Ross & Madonna did it and they hardly danced but their performances are still regarded as some of the best halftime shows of all time mainly due to the production value. If Rihanna does it, she would also need impeccable staging & production value.
It would be the worst half time of all time the gifs of her dancing the audio of her vocals the media attacking her for her repetitive over sexed choreo
the gifs of her dancing the audio of her vocals the media attacking her for her repetitive over sexed choreo 