My mates told me tale about this one - There was a guy at the back of the church at christmas midnight mass. You used to (still do) get a lot of drunks calling in on the way home from the pub and standing at the back to get the credit for attending. One guy had a ghetto blaster with him and switched it on by mistake. This started playing.
Don't think anyone can ever really get close to the original, but this does a good job of making it their own while still keeping some of the emotion of the original.