Glam is a glitzy rock genre that originated in the United Kingdom in the 1970s. It is characterized by its outrageous fashion, theatrical performances, and use of synthesizers and other electronic instruments. Glam rock bands often featured androgynous singers and musicians, and their music was heavily influenced by glamour and excess. Glam rock has been described as a combination of hard rock, pop, and camp. Popular glam rock bands include T. Rex, David Bowie, and Queen.