Hits: Metallica's M72 Formula: More Sellouts, Less Burnout

“They are absolutely at the highest plateau in terms of their worldwide popularity,” says Q Prime’s Cliff Burnstein, who, with partner Peter Mensch, has managed the band since 1984. “Back then, the idea of bands working into their 60s was not something we took seriously; we didn't think there would be a business where you could have this kind of popularity at this age. It's beyond what we ever could have imagined.”

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