What Christmas song do you hate/find super annoying?
Most of them. They get played over and over and over and horribly overdone as stores try to create some mysterious "Christmas spirit", as if playing the same canned muzak over and over encourages people to spend more money.
I think they hope people will just put stuff in their carts and pay fast. Personally if I get sick of canned muzak I abandon my cart and walk out. I don't care what's in it, if the atmosphere in the store annoys me enough I leave it wherever I was and go somewhere else.