Oh FFS anything but Can't Help Falling in Love. Something with a bit of tempo. We're trying to create an atmosphere not kill it off. The Wheels On The Bus would be better.
I swear to god if I have to listen to that tuneless drivel during the game as well as before it I'm going to do something someone will regret. At least before a game I can drown it out with my MP3.
Something more modern would be better. Also not letting a small minority of fans decide what the band plays would be a better idea still. Engage some of the kids and younger end of the fanbase and the families find out what they want. Engage the wider community outside the fanbase, find out what songs are popular.
Or an even better idea would be finding out what the band can and cannot play and tailoring the singing to fit in with the band. That way everybody would know what they are supposed to be singing and when.