The countdown is on until A Very Glee Christmas.

That's the name of Tuesday's 2010 finale of this Fox musical comedy, as it will center around Brittany's belief in Santa Claus and Sue's plans to thwart her fellow teachers' gift-giving game. It will also feature Kurt and Blaine dueting on "Baby It’s Cold Outside” (watch it NOW!) and Rachel singing "Merry Christmas, Darling."

We've already given readers a sneak peek at the episode in this video and now we've posted a slew of photos from the installment below. Click around and enjoy!

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.