Jingle bells, Batman smells
Robin laid an egg
Batmobile lost its wheel
Commissioner broke his leg.
I always found the last line a bit lame, far more interesting Batman characters to choose from.
"Don Gato" was by far the favorite among the Ist -5th grade set. I do recall singing "Age of Aquarius" in 6th grade for some kind of last day of school program. Odd, looking back on it.