Sylvia Robinson produced a 1979 song what group whose fifth album was released in 1999?
Jump on It!:  The album was released in 1999 for Rhino Entertainment and was the first album by the group since 1984's "Livin' in the Fast Lane". Rapper's Delight: "Rapper's Delight" is a hip-hop song released in September 1979 by The Sugarhill Gang, and produced by ex-Mickey and Sylvia member Sylvia Robinson.
The Sugarhill Gang