R&B and gospel singer Billy Davis, Jr. is inextricably linked with pop-soul hitmakers the 5th Dimension and his duet partner and wife Marilyn McCoo. Davis and McCoo achieved fame together in the late '60s as founding members of the Grammy-winning, chart-topping 5th Dimension. As a duo, they earned the same major distinctions with "You Don't Have to Be a Star (To Be in My Show)," a 1976 smash that, appropriately enough, preceded the two co-hosting The Marilyn McCoo and Billy Davis, Jr. Show. Although they haven't recorded as often since the late '70s, Davis and McCoo continue t...