Ella Fitzgerald

Ella Fitzgerald (April 25, 1917 – June 15, 1996), also known as the "First Lady of Song", "Queen of Jazz", and "Lady Ella", was an American jazz vocalist with a vocal range spanning three octaves (D?3 to D?6). She was noted for her purity of tone, impeccable diction, phrasing and intonation, and a "horn-like" improvisational ability, particularly in her scat singing.

source: Wikipedia