A relentless innovator, scoring chart hits while simultaneously incorporating radical and ground-breaking elements into his work.As with all great pop stars, Bowie's image changed with almost every new album release. This appetite for reinvention, both musically and visually, saw him dubbed the 'chameleon of pop'. But Bowie's influence extended well beyond his discography and make-up drawer. His androgynous qualities and public statements on his sexuality proved liberating fo