25 Days of Christmas Tunes: Mr. Heatmiser by Big Bad Voodoo Daddy

I have no idea how old The Year Without a Santa Claus is, but I do know the most enjoyable part is when Heatmiser and Coldmiser sing. Their song made the popular enough that they got a spin off movie some time in the last decade, though I never watched it. I was pretty excited when I first found out that Big Bad Voodoo Daddy did a cover of the song. I think they did a really good job. What is your favorite song from a Christmas special?