Coldplay
I hate sport and, since I'm not American, I have no interest in the Super Bowl. Therefore what could be better than for my most hated band in the world to perform at half-time? I would know where they were, should I decide to call in the ninjas for unspecified services, and I would know that they were inflicting their bed-wetting musings on imbeciles who don't deserve any better.

Kasabian
For the reasons given above. Except with the potentially added bonus that an American crowd would be so non-plussed by the vapid cock frenzy of meaningless posturing and wearing of hats that it would be driven into a frenzy of murderous magnitude, storm the stage and kill every last Leicester-born idiot on stage.