Sarah Vaughan was an American jazz vocalist, renowned for her rich voice and wide vocal range. Known for her melismatic singing style and unique vibrato, Vaughan was a prominent figure in the bebop era, contributing significantly to jazz music's evolution. She had an illustrious career spanning over four decades, with influential works such as "Misty" and "Send in the Clowns". Vaughan's distinctive style and artistry have solidified her legacy as one of the 20th century's most influential jazz singers.