Sophisticated Lady With a singing career that stretched from the mid-forties well into the eighties, Sarah Vaughan could arguably be called the best jazz singer ever. If not at the head of her class, then she was in rare company, often being mentioned in the same breath as Ella Fitzgerald and Billie Holiday. Her vocal stylings and lyrical interpretations lent a depth and scope to the music that can not be imitated, and has not been heard since.