The NFL would not allow the Red Hot Chili Peppers to perform live at the Super Bowl.  So, the band didn't bother with plugging in.

That's not the first time a band was forced to play to a pre-recorded track.  It happens a lot of television shows, most notably on the UK's Top of the Pops.  Flea actually mentioned being kicked off of the show during rehearsals for refusing to properly mimic their song.

But, a few others bands got through.  Nirvana did the show in 1991.  They had to play to a pre-recorded track, but the vocals were live.  So, the result was Dave Grohl's and Krist Novoselic's exaggerated playing.  Kurt Cobain flat out didn't pretend to play his guitar during parts of Smells Like Teen Spirit.  His vocals made you wonder if Jim Morrison was there.

A few years later, Oasis appeared on Top of the Pops.  Their performance of Roll With It was completely prerecorded.  So, the Gallagher brothers switched places.  Noel was out front with a tambourine and everybody laughed at Liam's guitar solo.

Back in 2009, Muse was asked to mime their song, Uprising.  They just switched everybody around.  Front-man Matt Bellamy played drums.  Drummer Dominic Howard handled bass and vocals.  Bassist Christopher Wolstenholme had a guitar.

They even did an interview.