Well no, I do believe Palace have won numerous awards for the legendary amazingness of their support, surely? No wonder they mock clappers, I mean their goal music & callback procession essentially means they're second only to Borussia Dortmund I think.
Coventry have sung that song for a few years now, there are other similar videos on YouTube if you look.
That said, I am waiting for some Palace fan to show up to tell us that they sung it first and it's their song and they have the best fans in the world ever and everyone else wants to be like...