White Christmas by the Drifters
You may have heard it before, but its a treat every holiday season - the Drifters’ classic version of White Christmas, with the on-its-way-to-being-a-classic flash animation featuring Santa and his reindeer.
For an active link to the peformance, see this post from Neatorama.
Or perhaps you would prefer the Bing Crosby Original White Christmas Performance.