Queen embodied 1970s glam rock--mixing heavy riffs and intricate vocal harmonies with a gender-bending image. Freddie Mercury's operatic voice and Brian May's guitar were multi-tracked ad infinitum to create pomp-rock in the grandest sense. In the '80s, Queen tried on rockabilly, disco, and more, but always returned to their arena-rock roots. The group ended with Mercury's tragic AIDS-related death in 1991.