One thing I pondered today - when you look at the Christmas compilations (and there are many), the 'core' is always the same tracks. Now I have no problem with that, but what is quite evident is that nobody has really added a classic that makes it into all the collections for years, even decades. You can go right back to the 50s, 60s, 70s & 80s and each decade added a few to the mix.
What was the last Christmas classic to truly join?