It's a toss-up between Silent Night and Fairytale of New York. Depends on my mood.

"Adeste Fideles", sung by Bing Crosby. I love the way he sings in Latin (!). The instrumentation of the song is wonderful. The choir in the background is incredible. And the song gets better and better towards the end. I am not really a fan of "pop" music, but this one kills me. Thank you Bing Crosby you are a great man. 🌷

Mistress for Xmas - AC/DC

Three I like:

Merry Christmas Darling, Karen Carpenter

Merry Christmas, Bing Crosby

Happy Xmas, War Is Over, John Lennon, Yoko Ono

Grandma got run over by a reindeer

Where are You Christmas, All I Want for Christmas is You, and Last Christmas
Can't decide between the three.

It must have been ole santa claus

[youtube=https://m.youtube.com/watch?v=PA6QsHdXwdI]

THIS IS HALLOWEEN
THIS IS HALLOWEEN

One of the few that doesn’t make me cry is this one:
[youtube=https://www.youtube.com/watch?v=0_3HLtW8mCw]