Ok, let me first start off by saying I HATE Christmas music. I'm a scrooge, get over it.

So I'm "dee-jaying" my sister's work Christmas party tomorrow and I'm trying to get a playlist set up and some ideas. But I have little to no Christmas music.
I need suggestions. Nothing generic, like that crap you hear over and over on the radio. Generic songs are fine, if they're sung by not so generic people/bands.

Here's what I have so far (tracks from christmas albums from these artists)
Michael Buble
Justin Barfer...er, I mean Bieber
Relient K
The Click Five
Simple Plan
Toby Mac
Stuff from the Glee christmas album.

HELP PLZ.

Edit: If it helps, the people at this party will range in age from 18-25.