[maccawozzagod]

Andy Williams' Impossible Dream is very slow and sang as 'crooned'.

Carters' is a bit more shouty and faster when it gets to the chorus.

I think that anything loud that reaches crescendo is a good choice. But, the reason why The Ultras want to have an input into the final song or two is because it is they who are trying to get up for it and reach that high that certain songs give you. The people who sing will usually have a penchant for more cultish types of song rather than Meatloaf type songs (nowt wrong wi' owd Meaty though)

I'm with Diesel on the atmosphere building though. It should be that loud that you can't hear yourself talking and have no option but to sing. Of course, it means nothing without a roof.