XTC - Thanks for Christmas:
https://www.youtube.com/watch?v=0VhonU1aMw4

Bethan - In the Bleak Midwinter: (lullaby; wait for the moody strings)
https://www.youtube.com/watch?v=hmMQvU13Wi0

Joan Jett & The Blackhearts, featuring Obama - Silent Night:
https://www.youtube.com/watch?v=BuFURWSZkcI

Pearl Jam - Someday at Christmas:
https://www.youtube.com/watch?v=rGCnzz9H0Ws

EDIT: Is there also a place for classic folk songs across the FV..?
Me, I've found three absolute corkers, all tackling the song "500 Miles." I find each version remarkably unique and moving in their own ways, but I'd rather unleash them upon the most-appropriate community, if that makes sense...

EDIT2: If you really insist upon a small sample of such, then let's go with Joan Baez:
https://www.youtube.com/watch?v=B_K6z3HiRAs