I know I'm the only one on here who is a Steelers maniac, so, here's some parts you can just skip right to. This is where you can find some of the players you probably are most familiar with.
At 4:06, you'll find the running backs and wide receivers singing "Rudolph the Red Nosed Reindeer"...(Hines Ward is #86)
At 5:32, you'll find the offensive line and Quarterbacks singing "The Most Wonderful Time of the Year"...that's where Big Ben fans will find Big Ben Roethlisberger (#7...hes right out in front)!
And I highly recommend that if you don't watch the whole thing, at least fast forward to 6:16 to watch the Defensive Lineman sing "Santa Claus Goes Straight to the Ghetto." Definitely worth it for Steelers fans and non-Steelers fans alike!
You can tell that they're reading the words off of something (except for the Straight to the Ghetto one).

http://www.steelers.com/video-and-audio ... c2af67f449
And here's a few xmas song parodies and some non-traditional songs we might all enjoy!
And of course, the best xmas song ever: