As for annoying songs, I have to say Grandma Got Run Over by a Reindeer. I've never been all that found of that one. D:
I've gotten to the point where I don't really care for them. It also doesn't help when the radio stations start playing them earlier and earlier. That and the fact that they play them 24/7.
I'm glad my store doesn't play that crap or we'd all lose our minds.