what's up with everybody? A free concert with filming and there's barely a fart.

You certainly have a way with words Yorkie.
I expect, they will do most of their material from the Christmas CD. As to what they will perform, I can only guess.
My guesses always turn out to be wrong

I expect, it will be the more traditional Christmas hymns

But what do I know, i'm always wrong.
Wheres the expert opinions then.
Well that's my fart...

