Next to Elvis, Lennon, McCartney, Bowie, Morrison, Dylan and Hendrix, Robert Plant is one of the most recognizable voices in the history of rock'n'roll. Robert Plant could easily refrain from ever releasing another track to the public and avoid the scrutiny of die-hard Zeppelin fans who want nothing more than a re-hashed version of "The Battle of Evermore." Instead, Plant continues to take risks and release new music that piques the interest of fans across genres.