One of my favorite things about Christmas when I was growing up was going to a family friends house and singing carols with their very musically inclined family and whomever else they would invite. It was always a big crowd and they did it at least once a week during the month of December.
As for songs I have always liked we three kings of orient are. It's just got a cool ryhthym and I find myself humming it throughout the year. I am also quite fond of carol of the bells.
I'm not sure I would want to do a solo. But maybe with enough liquid courage and maybe a few other people I would karaoke a Christmas song.
Happy holidays everyone!