We’re celebrating musical icons with four top-notch documentaries. The first looks at the life of Freddie Mercury, then there’s David Bowie, Elton John and Prince. Queen’s legendary lead singer Freddie Mercury boasted a remarkable four-octave singing range which was a key ingredient in the band's enduring success. Of course, he partied like a rock star (which he was) too and was diagnosed with HIV and passed away at just 45 years of age.