Nirvana's 'Nevermind' marks 20th anniversary

4 of 10: Nirvana's first attempt at mixing 'Nevermind' was a 'disaster,' Rolling Stone reported, quoting producer Butch Vig as saying: 'I'd be balancing the drums and the guitars and Kurt would come and say, 'Turn all the treble off. I want it to sound more like Black Sabbath.'

(Pictured: Ozzy Osbourne appears with Black Sabbath in the heavy metal's music video for 'Paranoid' in 1970.) ( Photo / Warner Bros Music)