Gayla Peevey Henderson (born March 8, 1943) is a former singer and child star from Ponca City, Oklahoma. She is best known for her recording, under her maiden name Gayla Peevey, of "I Want a Hippopotamus for Christmas" (Columbia 4-40106, 1953). Peevey recorded the novelty song when she was 10 years old. 　　  　　In 1959, she had a minor hit with the song "Robot Man", recorded under the name Jamie Horton. The song was covered by Connie Francis. 　　  　　Peevey graduated from San Diego State University with a Bachelor of Education degree. She eventually left teaching and owned her own advertising firm for 15 years. She is married to Cliff Henderson. They have a daughter, Sydney Forest, and three grandchildren. 　　  　　The Oklahoma City Zoo capitalized upon the popularity of "I Want A Hippopotamus for Christmas" with a fundraising campaign to "buy a hippo for Gayla". The fund raised $3,000 (equivalent to $27,552.12 present day), and a baby hippopotamus named Matilda was purchased and given to Peevey which she then donated to the zoo. The hippopotamus named Matilda spent 45 years in the Oklahoma City Zoo, and then passed away at age 47 from a heart attack in 1998 while being transferred to the Walt Disney World's Disney's Animal Kingdom, in Orlando, Florida.