We do stop the cavalry and "Merry Christmas Everyone" (the shakin stevens one). Not sure really how stop the cavalry is a christmas song but there you go. This year, I got fed up with dragging a keyboard around, now I have put everything on my floor pedals, so I brought a sampler for the cavalry charge intro and bells, worked really well.
Would love to play the wizzard one, absolutely hate the slade one!
I suppose that the other modern standard would be the mariah carey version.