Pop music is a genre of popular music that originated in the 1950s. It includes a variety of styles, such as rock, hip hop, country, and R&B. Two specific subgenres of pop music are Tejano and Emo. Tejano is a style of Mexican-American music that originated in Texas in the late 19th century. It combines traditional Mexican music with elements of country, rock, and blues. Emo is a style of rock music that emerged in the mid-1990s. It is characterized by emotional lyrics and melodic guitar riffs.