United Kingdom, May 29 -- Ozzy Osbourne is suffering "badly" from ADHD.

The 76-year-old rock icon is set to reunite with Black Sabbath on 5 July in Birmingham for the 'Back to the Beginning' concert, which is set to be his final show after he was struck by a series of health issues, and he has now admitted the impact of preparing for the gig.

He told the 'Ozzy Speaks' podcast on SiriusXM: "All I can say is I'm giving 120 percent. If my God wants me to do the show, I'll do it."

The performance at Villa Park marks Ozzy's first live appearance since 2018 and follows a series of health setbacks, including his 2020 public disclosure of a Parkinson's disease diagnosis.

He added on his podcast about the mental toll of preparing to return to ...