The original line-up of heavy metal legends Black Sabbath, including Ozzy Osbourne, will play together for the first time in 20 years at a one-off concert on July 5 in Birmingham, England, organisers said on Wednesday. The gig will feature guitarist Tony Iommi, bassist Geezer Butler and drummer Bill Ward — who along with charismatic frontman Osbourne pioneered heavy metal music in the early 1970s with hits such as "War Pigs", "Paranoid" and "Iron Man".