There was a pretty cool show on NFL network that talked about how the Steelers started playing Renegade by Styx at the games to get the crowd and the fans fired up and it sounds like its working pretty good.
The song gets me pumped up and it seems to be adding a little fuel to the fire of the players on the field.
Cowboy stadium needs something like this, do they still play that lame "Da-da-da-dum" after plays?
Here's an article and a video that describes it better than I did, I couldn't find the video that was done by NFL films.
http://bleacherreport.com/articles/84211-the-pittsburgh-steelers-renegade-a-brief-history