Say, did I happen to mention that I’m having a wonderful Christmastime?
Sir Paul is simply having a wonderful Christmastime. Which he feels the need to tell you about once every three seconds, backed by the dulcet tones of the Sequential Circuits Prophet-5 synthesizer. Between this and “Helen Wheels,” Sir Paul might need to have his knighthood rescinded. — Mrs. LDBC
Little Drummer Boy Challenge 
No question, worst Christmas song of all time.
Ha! I was going to comment, but I already did…last year! I cannot BEAR this song. Worse than ALL others!!