Sarah Lois Vaughan (nicknamed "Sassy" and "The Divine One") (March 27, 1924, -- April 3, 1990) was an American jazz singer, described by Scott Yanow as having "one of the most wondrous voices of the 20th century".
Although Sarah Vaughan is usually considered a "Jazz Singer," she avoided classifying herself as such. Indeed, her approach to her "Jazz" work and her commercial "Pop" material was not radically different. Vaughan stuck throughout her career to the jazz-infused style of music that she came of age with, only rarely dabbling in rock-era styles that usually did not suit her unique vocal talents.