Vocal jazz
Vocal jazz or jazz singing is an instrumental approach to jazz using the voice. Similar to a cappella, it utilizes vocal arrangements to create sounds forming music, rather than relying on traditional musical instruments. Vocal jazz emerged in the early twentieth century, with its roots in Blues. Popular blues singers such as Bessie Smith and Ma Rainey would later have a great deal of influence of jazz vocalists such as Billie Holiday. Other characteristics of vocal jazz such as scat singing would come out of the New Orleans jazz tradition. Louis Armstrong's 1926 recording of "Heebie Jeebies