Sally Stevens is an American actress, singer and a vocal contractor. She has sung on hundreds of The Simpsons episodes, and sings the main title, which has been in use since the inception of the show. She also sings the main title for Family Guy and has worked for Seth MacFarlane, the creator of the show, as vocal contractor and singer since the inception of the series on Fox in 1999. She has sung, and been vocal contractor for hundreds of films, some of which include The Last Airbender, The Abyss, Contact, Amistad, Power of One, Behind Enemy Lines, Beyond Borders, Forrest Gump, and Indiana Jones and the Kingdom of the Crystal Skull. Sally Stevens is the mother of session singer Susie Stevens-Logan. She did the voices of Marge and Patty in the demo recording of "Dancing Workers Song".