R&B is a music genre that combines elements of rhythm and blues, pop, soul, funk and hip hop and electronic music. Some artists include:Beyonce, Trey Songz, and Mariah Carey.
Rap refers to "spoken rhyming lyrics". It is poetry in the form of a song. Some artists include:Drake, Nicki Minaj, and Kendrick Lamar.
Jazz is a musical style that began in the 20th century in black communities of Southern states. Jazz typically consist instrumental music. Some times people scat when they perform jazz. Some artists include:Miles Davis, Louis Armstrong, and Billie Holiday.