Ugh I accidentally voted for the Holiday Spectacular, which is not only not the best Xmas episode but the worst episode over all. A Tale of Two Santas is the best in my opinion. The episode is high quality throughout but the fact that it has one of my favorite moments from the entire series pulls it ahead.
Poopenmeyer: "My God! The real Santa! Get him, Jesus!"
Zoidberg: "I help those who help themselves!"
That sounds like Fry missing the button in ABPOG, so now we have two votes for Holiday Craptacular, this really won't do