Ozzy Osbourne will reunite with all of the original members of Black Sabbath for the first time in 20 years, in a gig that will be his last and that's being billed as the “greatest” heavy metal show ever,

Ozzy Osbourne will come out of touring retirement and reunite with the full Black Sabbath lineup for the first time in 20 years.

Black Sabbath is reuniting for one more show to celebrate Ozzy Osbourne's final concert in Birmingham, England on July 5.