The Twilight Singers | Robert Schumann International Competition for Pianists and Singers | BBC Singers | the Staple Singers | King's Singers | The Freedom Singers | Serendipity | Hootenanny Singers | The Staple Singers | Serendipity (film) | serendipity | Selah Jubilee Singers | List of Pakistani pop singers | Les Humphries Singers | King of the Delta Blues Singers | Hutchinson Family Singers | Fisk Jubilee Singers | Elmer Iseler Singers | Dale Warland Singers | All My Friends Are Funeral Singers | Vancouver Cantata Singers | Twilight as Played by The Twilight Singers | Thomas Circle Singers | The Twilight Singers. | The Story of the Trapp Family Singers | The Lani Singers | the King’s Singers | The Drinkard Singers | The Countdown Singers | Songs For The Singers Of Panthers |
Hickey also wrote songs for other artists, including "The Millionaire" for Jackie Wilson, "A Little Bird Told Me So" for LaVern Baker, and "Don't Let the Rain Come Down", which was a US top ten hit for the Serendipity Singers.