Rock music was born out of controversy, and its rebellious image has always appealed to fans. Nonconformity and misbehaviour are central to the rock movement. Rock music has played an enormous role in the recent development of the western musical tradition, and rock music has been dominant among popular styles. Radio, television and the internet are ways to learn about rock history. Cable networks often offer profiles of artists and styles. I know what i like: the fan mentality. Fans of rock music listen frequently to the music of a particular artist, group, or style and gather interesting facts about both the artists and the music. Charts help us draw general conclusions about the popularity of a song or album at the time it was released. Charts are not precision instruments for measuring a song or album"s success or popularity, and they do not accurately reflect the popularity or influence of some songs or albums.