This is famous Rock n Roll artists that make a huge impact on the rock 'n' roll revolution. The first wave of rock & rollers is Chuck Berry, Elvis Presley, and many others. They set the template for rock & roll that was followed over the next four decades. During each decade, a number of artists replicated the sound of the first rockers, while some expanded that definition and others completely exploded the constrictions of the genre. From the British Invasion, folk-rock, and through hard rock, heavy metal, glam rock, and punk, most subgenres of rock & roll initially demonstrated an allegiance to the basic structure of rock & roll. Once these permutations emerged, traditional rock & roll faded away from the pop charts, yet there were always artists that kept the flame alive. Although the term "rock & roll" came to refer to a number of different music styles in the decades following its inception, the essential form of the music never changed.