Sir George Martin, arguably the most influential producer in the history of rock 'n roll music, has died peacefully at age 90. Martin was described by Paul McCartney as his "second father" because he had guided the Beatles through their early years, producing all but one of their albums and giving them the distinctive sound that resulted in them becoming legends. His influence on the band was so important that he gained the nick name of "The Fifith Beatle". Martin went on to exert his influence with other major acts over the decades, remaining a powerful force in the music industry. For full details of Sir George's remarkable life, click here.