The Canadian Version of "The Monsters of Rock" was held exclusively on 26 July 2008 at the McMahon Stadium located in Calgary, Alberta, Canada. It was also scheduled as a "one time only" event. The main attraction for the festival of heavy metal and mayhem were metal giants Judas Priest and the headliner, Ozzy Osbourne. In addition, various other "big league" heavy metal outfits attended the festivities. The following bands preceded the two main attractions: Serj Tankian, Hatebreed, Cavalera Conspiracy (featuring current frontman of Soulfly,and former frontman of Sepultura, Max Cavalera), Shadows Fall, Canadian metal unit Voivod, Testament, 3 Inches of Blood, Priestess, Zimmers Hole, and Dillinger Escape Plan.