Sarah Vaughan was an American jazz singer and pianist, often referred to as 'The Divine One'. She was a three-time Grammy Award winner and was inducted into the Down Beat Jazz Hall of Fame. She is best known for her jazzy vocal style and her ability to improvise. She was also known for her collaborations with other jazz greats such as Miles Davis and Dizzy Gillespie. Her nickname, Jazzy Vaughan, was a testament to her skill and influence in the jazz world.