Apparently, there is a very good explanation for their absence, according to singer Rob Halford: they’re double-booked.

Rob Halford has opened up about why Judas Priest are one of the few veteran metal bands not booked to play at Ozzy Osbourne ...

Rob Halford has opened up about why Judas Priest ... at Ozzy Osbourne and Black Sabbath’s swan song in Birmingham this summer. The 73-year-old singer revealed he’s “gutted” to miss out.

With Ozzy Osbourne set to perform one last time with Black Sabbath, Rob Halford shared the reason he was missing the event.

Judas Priest has a good excuse for missing Black Sabbath's farewell show. But again, music fans are the ones who miss out.