WATCH: Justin Bieber 'covers' Metallica's 'Fade To Black'
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When Justin Bieber told 'GQ' magazine that he was a Metallica fan last year, he wasn't kidding.
The pop star was caught on video playing air guitar and using his voice to cover Kirk Hammett's guitar solo from the band's song "Fade to Black" - a song that came out 10 years before the Bieb was even born.
Watch him rock the air guitar below: