Pop music originated in the late 1950s as a derivation of traditional pop combined with other popular genres of the time. Pop music is a light, popular genre derived from black musical styles and British folk music that has absorbed influences from most other popular genres throughout its existence. The main element of pop music is a song typically between 3 to 5 minutes featuring a constant, memorable rhythm in a mainstream, simple structure designed to appeal widely for commercial profit rather than artistic ambition.