This document discusses several popular music genres including pop, rap, and alternative rock. For pop music, it notes that the genre originated in the 1950s/60s and features artists like Madonna, Taylor Swift, and Michael Jackson. Typical pop music videos connect lyrics to visuals through obvious meanings and feature bright colors, hair/clothing styles, and prominent artist logos. Rap music originated in 1970s America and consists of rhythmic rapping over instrumentation. Common rap video conventions include portraying the artist as powerful through close-ups and wealth symbols, as well as reflecting urban poverty. Alternative rock arose in the 1980s from independent music and features distorted sounds and social messages; popular groups include Nirvana, Arctic Mon