Metallica have teamed up with Diamond Head’s Brian Tatler for a live performance of ‘Am I Evil?’ in Oslo.The performance of Diamond Head’s 1980 hit occurred last night (June 26th) during Metallica’s headlining set at the Tons of Rock fest in Oslo, Norway. The legendary metal band previously released a cover of the song in 1984 and served as the B-side to their single ‘Creeping Death’.“Say ‘Hi’ to Brian, Oslo!” announced Metallica frontman James Hetfield introducing the Diamond Head lead guitarist.