Yesterday we heard rumors buzzing (substantiated by a description on DirecTV’s online schedule that was quickly pulled down) that Ozzy Osbourne would be making an appearance at this year’s BlizzCon. Today Blizzard has indeed confirmed that our favorite stammering, incomprehensible rocker will not just appear at the August 21-22 event, but will headline the closing concert.

“Our goal with BlizzCon is to deliver an unforgettable weekend of entertainment, and we can’t think of a better way to close out this year’s show than having Ozzy rock the house,” said Mike Morhaime, CEO and cofounder of Blizzard Entertainment. “Many of us at Blizzard are lifelong fans of Ozzy’s music, and we’re thrilled that he’ll be performing for all of our BlizzCon attendees as well as those joining us via DirecTV and the live Internet stream.”