Carol of the Bells.
That has got to be my favorite Christmas Carol of all times. I have 30 different version of it in my iTunes library (well that is what a search of my library turns up) that is about 1.3 hours. I know I am starting 2 days early on my Christmas music, but when I was a kid I remember my parents would start the Christmas music on the drive up to Behamtan New York when we would visit our Grandparents for Thanksgiving so for me this is not to early it just tradition in my family. A part of me misses those yearly trips up to Behamtan, but time moves one and things change.
