Rock is a style ofpopular music. Since the 1950s, rock has probably had more fans than any other form of music. Rock music has had many styles and forms over the years. One thing that most rock music has is a strong beat. Rock almost always focuses on the singer or singers. It often features electric guitars along with drums, electric bass, and sometimes piano or organ. Some rock musicians also use saxophones, trumpets, and other horns in their music. Rock music styles include country rock, heavy metal, alternative rock, punk rock, and many others.