The term 'Santa Baby Singer' refers to the American singer and actress Eartha Kitt. Kitt is best known for her 1953 Christmas song 'Santa Baby'. Kitt was born in 1927 and had a successful career in music, film, and television. She was often referred to by her stage name, 'Kitt', which is a 3-letter word, or her full name, 'Eartha Kitt', which is a 10-letter word. Her nickname was also 'Kittt', which is a 4-letter word.