Ella Fitzgerald was an American singer widely regarded as one of the greatest voices in twentieth-century jazz. Nicknamed the First Lady of Song, she was known for her exceptional vocal technique, rhythmic precision and remarkable mastery of scat singing, moving effortlessly between swing, bebop and standards from the Great American Songbook. With albums such as Ella Fitzgerald Sings the Cole Porter Song Book, Ella and Louis and Mack the Knife: Ella in Berlin, she left a profound mark on the history of vocal jazz.