This is The Most Recorded Christmas Song of All-Time
TIME magazine sifted through the records at the copyright office to find out what the most frequently recorded Christmas songs are. In first place by a long shot is "Silent Night". "Joy To The World" is second.
TIME's research only includes songs and albums recorded since 1978; that is when the copyright office started digitizing records. "O Holy Night" (not the version we play, although I guess it counts), "What Child Is This?", and "Away In a Manger" also did well. TIME points out that songs like "O Holy Night" are popular to record because their original copyright has expired. Conspicuously absent was "Dominick The Christmas Donkey".
Unsurprisingly, there was no mention of "All I Want For Christmas Is You", either, but I suppose we could help change that.