A. Rudolph the Dead-Nosed Reindeer.
Rudolph the Dead-Nosed ReinderrWhat? That's not enough? Need more Chistmas zombie songs? All right, here:
Had a very shiny nose
And if you ever saw it
You could watch it decompose
All of the other reindeer
Used to groan and call him names
They never let poor Rudolph
Come with them in search of brains
Then one foggy Christmas Eve
"Rudolph with your nose so dead,
Won't you help me pull my sled?"
Then how the reindeer loved him
As they shouted out with glee:
"Rudolph the Dead-Nosed Reindeer,
Eat a brain or two for me!"
Harley Got Devoured by the Undead from the H.P. Lovecraft Historical Society:
And on a slightly more metal note, Christmas Night Of The Living Dead by MXPX: