Fran Jeffries was an American singer, dancer, and actress, born in 1937 and active in the music industry from the late 1950s to the 1990s. She was known for her sophisticated vocal style, often crooning jazz, pop, and bossa nova numbers. Jeffries gained significant recognition for her performance of the song "Sex and the Single Girl" in the 1964 film of the same name. Despite not being a prolific recording artist, her contributions to music and film have left a lasting impression on the industry.