Above is "Monster Holiday" by Bobby "Boris" Pickett and the Crypt-Kickers from an LP "Monster Mash" on the London label that was released in 1973.
Here's what Wikipedia has to say about him-
"Bobby "Boris" Pickett (born Robert George Pickett, February 11, 1938, in Somerville, Massachusetts) is a musician and actor, best known for singing and co-writing the 1962 hit novelty song "Monster Mash". Pickett performed the track in an impersonation of veteran horror film stars Boris Karloff, and Bela Lugosi (as in the line "Whatever happened to my Transylvania Twist?"). Bobby Pickett co-wrote the song along with Leonard Capizzi. It became a million seller, as well as reaching Number One on the Billboard Hot 100 chart. The song was styled as being by Bobby "Boris" Pickett & The Crypt-Kicker 5. In Britain it took until October 1973 for the tune to become popular, but it then pinnacled at Number 3 in the UK singles chart. A Christmas themed follow-up, "Monster's Holiday", was also released in 1962 and became a minor hit. In October 2005, Pickett protested inaction on global warming by releasing "Climate Mash", a new version of his hit single."