This isn’t really a song but an instrumental, but it’s so completely joyous that I couldn’t possibly go with an alternative. The Boston Pops Orchestra is the fun branch of the Boston Symphony Orchestra, and has since 1885 been delighting audiences with renditions of popular and, especially, holiday songs. This recording, from 1949, is their first but by no means only version of this track, which if you’re going to have a golden Christmas oldie, is in my view certainly the best one to pick. Listen out for the sound effects (hooves and bells); they are excellent.