Mandatory Credit: Photo by John Twine/ANL/REX (1588191a) Diana Ross Cindy Birdsong And Mary Wilson Of The Supremes Singing Group With Vanessa Redgrave Actress At Duke And Duchess Of Bedford's (not Pictured) Party 1968. Diana Ross Cindy Birdsong And Mary Wilson Of The Supremes Singing Group With Vanessa Redgrave Actress At Duke And Duchess Of Bedford's (not Pictured) Party 1968.