Rock music originated in the 1950s from genres like blues and country and developed extensively in the 1960s in the US and UK. It is characterized by electric guitars, bass, and drums and typically song-based lyrics addressing themes like love and social/political issues. Some iconic rock bands include The Beatles, who became the best-selling music artists ever, and AC/DC, a pioneering heavy metal band that has sold over 200 million albums worldwide. Rock music videos typically feature close-ups of the singer and band playing with quick cuts and stage pans to recreate a live show experience. The primary target audience of rock is males ages 11-40.