Best known as the lead singer of Queen, Freddie Mercury had an amazing four-octave voice. His range was a distinctive element in the band's unique sound, resulting in more than a dozen million-selling albums through the 1970s, '80s, and early '90s. Mark Blake traces Freddie's astonishing achievements from his childhood in Zanzibar and India to his world-conquering performance at Live Aid in 1985 and beyond.