Blanche Dorothea Jones Calloway (February 9, 1902 – December 16, 1978) was an American jazz singer, composer, and bandleader. She was the older sister of Cab Calloway and was a successful singer before her brother. With a music career that spanned over fifty years, Calloway was the first woman to lead an all-male orchestra and performed alongside musicians such as Cozy Cole, Chick Webb, and her brother. Her performing style was described as flamboyant and a major influence on her brother's performance style.