Rock stars and musicians like to think they got there through sheer talent, but 99 times out of 100 it was that old X Factor - a look, an image - that defines them. Think of any famous celebrity, and chances are you're thinking of one still image - Elvis, Marilyn, Debbie Harry, Iggy Pop, Ed Sheeran... One person who knows the power of the image is photographer Chris Cuffaro. He's taken shots of everyone from Nick Cave to Nirvana, Pearl Jam to George Michael. Chris visited New Zealand to present his famous "Greatest Hits" exhibition - over 60 framed works. Simon Morris asked him to go through some highlights of a dazzling career.