Encore - Christmas carols?

[Katya]

Tomorrow is December and I want to do a Christmas carol-themed Encore round of some sort. Any objections?

[Dead Cat]

None whatsoever. Also, sorry about totally forgetting about the Thanksgiving round. At least my blunder this time didn't cause lots of unnecessary stress. At least I don't think it did. And congrats on winning, Katya!

[Katya]

Oh, I totally didn't notice that I'd won! I thought I was just jumping the gun because I wanted to do Christmas carols.

[Unit of Energy]

Are we starting yet? I'm good at this one. What qualifies as a carol?

[Katya]

I'll write up some rules.