We just learned about the Christmas song Carol of the Bells.
Another famous Christmas song is Rudolph, the Red-Nosed Reindeer.
In 1939 Robert May wrote a book about Rudolph for the Montgomery Ward shopping store.
The book was so popular that May's brother Johnny Marks wrote a song about it, and then famous singer Gen Autry sang it in 1949 and it became very popular.
(from: wikipedia - rudolph the red-nosed reindeer (song))
Gene Autry with The Pinafores - Rudolph, The Red-Nosed Reindeer (Christmas Songs - Yule Log) - Christmas Songs
Kid Facts - Blast from the past: Ninety Five Theses