This document defines and describes several genres of popular music including pop music, rock music, jazz music, rock n' roll, and country music. Pop music originated in the 1950s-1960s from rock and roll and other styles. Rock music also originated in the 1950s in the US and UK as rock and roll developed into different styles. Jazz originated in New Orleans in the late 19th/early 20th centuries from African American styles and has a performance orientation. Rock and roll developed from genres like blues and gospel and originated in the US in the 1940s-1950s. Country music originated in the southern US in the 1920s combining American folk music and Western music styles.