I like the silly Christmas songs by Bob Rivers. They are parodies of both Christmas sngs and popular songs. These include "I Am Santa Claus" (a parody of Black Sabbath's "Iron Man"), "Walking 'Round in Women's Underwear" ("Winter Wonderland"), "Police Stop My Car" ("Feliz Navidad"), "All You Need is Elves" ("All You Need is Love"), "Toy Sack" ("Love Shack"), "Teddy the Red-Nose Senator" ("Rudolph the Red-Nose Reindeer"), among others.
I also like Paul McCartney's "Wonderful Christmastime" and Elton John's "Step Into Christmas." It took me years to find each of those on CD.