Paranoid is the second studio album by English metal band Black Sabbath. Paranoid contains several of the band's signature songs, including "Iron Man," "War Pigs," and the title track, which was the band's only Top 20 hit, reaching #4 in the UK charts. It is often regarded as one of the most quintessential and influential albums in heavy metal history. Black Sabbath was formed in Birmingham in 1968 by guitarist and main songwriter Tony Iommi, bassist and main lyricist Geezer Butler, singer Ozzy Osbourne, and drummer Bill Ward. Black Sabbath is often cited as pioneers of heavy metal music. The band helped define the genre with a clutch of groundbreaking albums in the '70s.