late one night
when my eyes beheld an eerie sight
for my monster from his slab began to rise
and suddenly to my surprise
(he did the mash)
He did the moooonster maasshh (the monster mash)
It was a graveyard smash (he did the mash)
It caught on in a flash (he did the mash)
He did the mooonster mash

Ya know, I heard the first two lines of this song play in a Halloween episode of Fresh Prince and I did figure out what song it was. Thank you.