India, Feb. 7 -- Singer-songwriter Ozzy Osbourne has announced his final concert. For the first time in 20 years, the OG band members of Black Sabbath, including Ozzy, will reunite for one last time. They are set to play a concert to raise funds in Birmingham on July 5. The heavy metal pioneers will headline a one-day festival, featuring dozens of bands they inspired, including Metallica, Pantera, Slayer, Gojira and Anthrax....