Adeste Fideles ( Oh Come All Ye Faithful ) - in Latin.
http://www.youtube.com/watch?v=ne09LaJ_fMQ
Silent Night
http://www.youtube.com/watch?v=tWCCX8Dt8I8
- the from the late great Gerry Rafferty’s last album “Life Goes On” released in 2009. He died in 2011.
The last links were from an experiment I just thought of earlier. Think of a singer or group you liked and never heard any Christmas songs from before in your life then search to see if they ever did any. I found these in the second place I searched. Fist search was “The Cars,” found nothing there. Going to continue.