Thursday 21st June 2012 by David Renshaw | Photos by WENN.com

Ozzy Osbourne cancelled a Black Sabath gig in Germany last night, just moments before he and his bandmates were due on stage. 

The reformed heavy metal band were due to play in Mannheim, Germany on Wednesday night (June 20) but 'vocal concerns' led to the performance being cancelled. Fans had gathered at the venue and even seen the Black Sabbath support act before hearing the news.

A spokesperson for Black Sabbath has assured fans that Ozzy is in perfect health, but could not perform on the night. Concert goers are recommended to check the venue website for a refund. 

Meanwhile, Ozzy was left devastated this week when it was revealed that his son Jack has been diagnosed with MS.

"If it was me, you'd think: 'Ozzy had a reputation and it caught up with him', but Jack is such a good guy," said Ozzy.

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