Plot: Cynthia Erivo is a creative phenomenon: a London-born, Tony, Grammy and Emmy award-winning actress, singer, songwriter and producer, whose career has taken her from her childhood in South London to the West End and Broadway, and whose recordings have also thrilled audiences on both sides of the Atlantic. Tonight, backed by the BBC Concert Orchestra she salutes the legendary female voices that have shown her the way: artists such as Nina Simone, Shirley Bassey, Billie Holiday and Gladys Knight