1970s to 1990s
During this era, pop music diversified into many other related genres such as Acid Rock, Disco, Techno, and Dance--and we can't forget Rap.
Rap music, part of the inner-city cultural move known as “Hip-Hop," started in the 1980s. During its birth, mainstream companies still did not accept it as just another trend. However, when America embraced Rap, it soon took over the scene.
Since then, for more than 25 years already, this genre has outsold Gospel, Country, Rock, R&B, and even Jazz. Today, Rap ranks second to pop when it comes to appeal, marketability, and profits. This genre has produced such stars as Eminem, Pink, Beck, Rage against the Machine, and others.