Los Angeles, July 7 -- Bidding a fond farewell and paying a heartfelt tribute to English heavy metal legends, Black Sabbath, on their farewell concert in Birmingham, American metal icons, Metallica, said they would not have existed if not for Sabbath.

The band played not one, but two Sabbath songs in their 30 minutes onstage at Villa Park, 'Hole In The Sky' from 1975's 'Sabotage' album, and 'Johnny Blade', a deep cut from 1978's 'Never Say Die!', which the thrash legends had never played before, reports Louder Sound today.

Frontman and rhythm guitarist has frequently spoken in the past about how hearing Black Sabbath's debut album when he was just nine years old completely altered the course of his life.

"This was more than just mu...