Ozzy Osbourne cancels a show minutes before stage time: 'vocal concerns' Jun 21, 2012 - There's no peace for Black Sabbath singer Ozzy Osbourne: last night in Germany he cancelled a show a few minutes before stage time, NME.com reports. The cancellation was sudden and unexpected: it was announced after support band Black Label Society had already finished their set. "Vocal concerns" was the simple reason given, even if a representative for the singer told american website TMZ that Ozzy is fine and in good conditions. The show was one of those labeled "Ozzy and friends", that took place of most of the ill-fated Black Sabbath reunion, haunted by¬†¬†Bill Ward's public announcement of his decision not to play¬†with the band and, most of all, by Tony Iommi struggle with cancer. Black Sabbath played only two ¬†shows¬†Birmingham on May 19, Download Festival on June 10 with a third one scheduled for August 3 at Lollapalooza in Chicago .