I'm in denial over how much I actually like Christmas carols. Maybe it's because most carolers are so annoying (even emoticon carolers, after awhile).
However, if you allow yourself to see past the cheesiness (as you must do for a lot of holiday traditions), you can appreciate them for how great they are. In the case of carols, I think all you need to be is the person with the mike in your hand.
Yes, Christmas carols are now on PlayStations 3's SingStore for SingStar! Announced earlier this month, you should now be able to log on and start downloading the $7 Christmas pack with songs like Toni Braxton's "Have Yourself a Merry Little Xmas" and Paul McCartney's "Wonderful Christmastime" (my fave!).