Bobby Pickett’s original is our favorite version of this Halloween Classic. This is his appearance live on American Bandstand. While I’m 99.5% positive this is a lip synch, he is live and his facial expressions are priceless.
Bobby Pickett – Monster Mash – Live on American Bandstand – October 1964
Fearsome Beard 
Something about the song scared me as a child. However, I love hearing it today!
This only became a hit here in 1973, reaching #3 in our charts. Until then I’d never heard of the chap, who’d surely be a most likely contender for title of World Gurning Champion.