The Ad Libs were an American vocal group prominent in the 1960s, best known for their doo-wop and soul music style. Their most recognized song is "The Boy from New York City," which peaked at number 8 on the Billboard Hot 100 in February 1965. The group's distinctive sound was characterized by the strong, soulful lead vocals of Mary Ann Thomas, backed by a tight, harmonious ensemble. Despite their limited discography, The Ad Libs contributed significantly to the sound of the '60s and have left an enduring mark on the soul and doo-wop genres.