What would normally amount to a summer-long hedonistic romp has now been reduced to one day. That's right, folks. After months of rumors, Ozzfest has indeed morphed from a traveling heavy metal festival into one-off event for 2008. Set for Dallas' Pizza Hut Park on Saturday, August 9, the spectacular will be headlined by Ozzy Osbourne and include Metallica in their Ozzfest debut.

The main stage line-up will also include Serj Tankian, Jonathan Davis of Korn and Shadows Fall, among others. A special all-star tribute to slain Pantera guitarist "Dimebag" Darrell Abbott will also be featured.

"Ozzy just finished an 11-month world tour so I think he deserves a summer off," said festival organizer and Ozzy's wife Sharon Osbourne about this year's one-day Ozzfest. "We're going to be a stadium destination festival for now -- we have gone past doing the sheds every summer. We've given everyone else the blueprint and we have to keep evolving Ozzfest."

Tickets for this year's festival will go on sale Saturday, May 31.