Despite an automatic cringe that I have developed over the years from hearing badly arranged Christmas carols played haphazardly in October at every shop in NYC (think: midi-accompanied pan flute rendition of 'Do You Hear What I Hear?' at Chinese-run Japanese restaurant), I do think it's fun to sing them with a bunch of other drunk people. Call it a guilty pleasure. 'O Holy Night' is the best one.
Here we go, Day 125: https://ia600809.us.archive.org/4/items/Improv121711/12_17_114_24Pm.mp3