Mine is the Hershey's Kisses "handbells" playing "We Wish You a Merry Christmas."

And from the UK: https://www.youtube.com/watch?v=Cheo1P22cUU

TISSUE WARNING! Get the kleenex. This sappy American boo-hooed like a little kid when I saw this one. It's beautiful. The guys on Madison Avenue could get a clue...