Although Ozzy Osbourne recently admitted that he'd fallen off the wagon, he insists he was sober whenever he was working on the new Black Sabbath album, 13.

Ozzy was drinking heavily for 18 months starting in 2011, and the recording sessions spanned most of 2012. But he says, "I was straight every day I was in the studio." He adds that he would drink at home after the sessions. He has now been clean and sober for "about three or four months."

Sabbath released 13 this past Tuesday.