
I Want a Hippopotamus for Christmas is a Christmas novelty song written by John Coctoasten and performed by Gayla Peevey in 1953. It is a Dr. Demento Christmas staple, and is currently available on Dr. Demento's The Greatest Novelty Records of All Time Vol. 6: Christmas.
Here's an interesting fact about the popular Christmas hippopotamus song - in 1953 a ten-year-old girl from Oklahoma, Gayla Peevey sang the song as a way to raise money for the Oklahoma City Zoo's first hippopotamus. It became a nationwide hit after that, although John Rox wrote the song "I Want a Hippopotamus for Christmas" in 1950! The song was not written specifically for the Oklahoma zoo, it's just that when they needed the hippo the song came out so the Christmas hippopotamus song just fitted in.