Well, as far as family tradtions, my Grandmother gets all of the family connected to her side (4 kids (2 uncles, 1 mom, and 1 aunt) 4 kid-in-laws, 5 grandkids (would be 8 but my sister's a b-word and my cousins are just jerks), 1 inlaw, sometimes her brother, and 2 great grandkids, totaling about 19 people in a double-wide (her included)) for a Christmas gathering. I'm usually the one that has to look after the Great yungin's, but they make me laugh, and oddly enough I do -_-
As Dad's side, it's just my father, aunt, sister, whatever boyfriend she has, and myself.
As for traditions in general, my dad's mom, or my Nana, would let me help her make Divinity, which is a creamy substance which melts in your mouth and is sweet. However, I don't do that anymore because my Aunt doesn't like cooking that much. Oddly enough this year my Mom and Dad are switching the tradition of putting up a tree (my dad is now putting one up).
Another tradition is where I go look at Christmas lights with some people of my family (I swear, it variates every year, mostly because of my sister.). I am going to try to get my friends to go with me this year, as I want them to sing some carols with the windows open like a bunch of drunken idiots.
As far as songs go, we listen to funny songs, such as songs suited for when the in-laws come over. "Siiilent Night, yeeeaah right." is a favorite between my father and I.
I'll just be happy when Christmas comes again, as for some reason, when there's free food and cold weather, everyone's a bit happier, non family memebers included.