Without a doubt, the Twisted Sister Christmas album is one of the best Christmas releases in a long time. Their "Heavy Metal Christmas" is probably the best song on the album. Any Christmas song that talks about tattoos, pentagrams, and bottles of Jack Daniels get my vote.
In case you missed any of my other totally fave Christmas tunes:
Day 1: Ozzy and Jessica Simpson - "Walking in a Winter Wonderland"
Day 2: Brian Setzer - "Sleigh Ride"
Day 3: John Denver and the Muppets - "12 Days of Christmas"
Of course, much credit to Greedo's 101 Christmas videos 2006 & 2007.