It seems against the rules that a Christmas song should be on any list of favorite songs. This classic, by the Pogues, has become a cult favorite, and I'm glad, because it's awesome. I love that such a beautiful song is contrasted by a certain verse (You're a bum, you're a punk/you're an old slut on junk), as well as contrasted by the man who wrote it and performed it (Shane MacGowan, his songs are much more lovely than he is... thank God). Maybe it doesn't do the same thing for you, but, whenever I hear this song, I get a huge smile on my face and feel like skipping around outside in the snow.
Oh, and random trivia: there is no NYPD choir. at all. that's a lie.