Ozzy, 76, who has Parkinson’s disease, sang while seated on a black throne – clapping, waving his arms and pulling wild-eyed looks, just like old times.
He appeared overwhelmed at some moments. “You have no idea how I feel. Thank you from the bottom of my heart,” he told the crowd at Villa Park in Birmingham.
He was joined by the full original Sabbath line-up for the first time in 20 years.
Wearing a leather overcoat and gold armband bearing his name, Ozzy rose from below the stage in his throne to a huge roar from the crowd.
“Are you ready? Let the madness begin,” he called.
“It’s so good to be on this stage. You have no idea,” he told the crowd, who responded by chanting his name.
After playing five songs from his solo career, Ozzy was joined by his Sabbath bandmates – guitarist Tony Iommi, bassist and lyricist Geezer Butler, and drummer Bill Ward – for four more, finishing with 1970 classic Paranoid.