Anita O'Day (October 18, 1919 - November 23, 2006) was an American jazz singer. Few female jazz singers matched the hard-swinging and equally hard-living Anita O'Day for sheer exuberance and talent in all areas of jazz vocals. Her improvising, wide dynamic tone, and innate sense of rhythm made her more than just another big-band canary. At a time when most female vocals tended to emphasize the sweet timbres of their voice, she chose to emphasize a path blazed by the one major jazz singer who emphasized message over medium - Billie Holiday.