In the 1980s, a new type of rock and roll was invented, called glam metal. Glam metal rock bands mixed pop music with heavy metal music. Glam metal bands such as Mötley Crüe, W.A.S.P. and Ratt became popular. Glam metal rock bands had long hair and the men wore make up and leather pants and boots. Many glam metal songs were about sex, illegal drug use, and drinking alcohol. In the late 1980s, groups such as Guns N' Roses were very successful.