I love singing Christmas carols/songs. They are my favorite. Although I can't carry a tune, I sing with all my heart -- much to the dismay of anyone who can hear!! :) Some of my favorites (not in any particular order) ...
Emmanuel (as sung by Amy Grant)
Angels We Have Heard on High
White Christmas (not really a carol though ...)
O Come, O Come, Emmanuel
The Gift Goes On
I could go on and on. The favorite Christmas album in our house is Amy Grant. When I was growing up it was The Little Drummer Bo.