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Even though AC/DC's Angus Young celebrated his 56th birthday yesterday, the guitarist is still young at heart, rocking out in his school boy uniform and mooning the audience at the band's shows. The secret to the band's success and longevity is very simple, as Young recently revealed on VH1 Radio.

"We've always stuck to that hard edge thing, and we've kept that all the way through," Young said. "We haven't drifted off into different things like disco or raps. We haven't ... tried to take on what's the latest thing."

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