[Subtitle] The vocalist spent the Seventies with the legendary group, and also sang backup on hits by Elvis Presley and Percy Sledge Donna Jean Godchaux-MacKay, who spent the Seventies singing with the Grateful Dead, sang back-up on several classic Sixties hits, and fronted her own bands, has died. She was 78. Godchaux joined the Grateful Dead in 1971 alongside her husband, Keith, who played keyboards. Her vocals were a key feature of the Dead’s seminal run during the Seventies, appearing on such classic albums as Europe ’72, Wake of the Flood, and Terrapin Station, not to mention countless legendary...