Barbara Feldon is an American actress and singer, best known for her role as Agent 99 in the 1960s television series "Get Smart". Her musical style is rooted in the pop standards and show tunes of her era. Feldon released a single album, "99", in 1966, featuring her signature sultry, melodic vocals. Though her musical output is limited, Feldon's contributions to the entertainment industry as a whole, including her music, have left a lasting impact.