I've always loved the wonderful spoof of Porky Pig singing Blue Christmas. In fact, every time the Elvis version of the song comes on the radio, I start singing THIS version for Francine instead.
She used to like this song (well, the original version of it, that is). I suppose I've ruined it for her now.
So, for your enjoyment, here is as performed by Seymour Swine and the Squealers back in 1978 here is "Blue Christmas"
(I found many different videos done to this song, but I liked this one posted by Mr. AntiSocial Guy because of the interesting trivia pop-ups in it)