Ozzy Osbourne has cancelled his "final" North American tour to seek treatment for health problems. "I’m so thankful that everyone has been patient because I’ve had a shit year," he says in a statement. Ozzy continues, "unfortunately, I won’t be able to get to Switzerland for treatment until April and the treatment takes six-eight weeks. I don't want to start a tour and then cancel shows at the last minute, as it’s just not fair to the fans. I’d rather they get a refund now and when I do the North American tour down the road, everyone who bought a ticket for these shows will be the first ones in line to purchase tickets at that time." Refunds are available at the point of purchase.

Ozzy revealed he'd been diagnosed with Parkinson's disease last month, but said the tour would go on, if he was well enough.

Megadeth were originally set to open Ozzy's North American dates; after they were postponed and rescheduled, Marilyn Manson replaced them as support.

Meanwhile, Ozzy's first album in ten years, Ordinary Man, comes out Friday.