Black Sabbath was a hard rock band mainly popular in the seventies. They began in the sixties as a stoner metal band, a style created by combining psychedelic rock with metal. Other examples include Led Zeppelin, The Jimi Hendrix Experience, and Cream. They are considered to be the first "doom metal" band. In the eighties frontman Ozzy Osbourne left to pursue a solo career and was replaced by Ronnie James Dio, previously of Rainbow. Dio turned the group into a power metal band, a triumphant-sounding style of metal more commonly associated with artists like Iron Maiden. He stayed with the band until his death in 2010, after which Osbourne returned until the group's breakup in 2017. Black Sabbath was phenomenally popular, with ten certified albums. Osbourne has a star on the Hollywood Walk of Fame. Their song Iron Man is about a soldier, not the superhero, although they did contribute to the film's soundtrack. They contributed to the Ninja Gaiden soundtrack.

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