Tickets for Mayhem Fest?

I am a Korn fanatic and I need to know when the tickets to Mayhem Fest. with Korn, Rob Zombie, FFDP and a few others coming to DTE Energy Music Theater, in Clarkston Michigan, go on sale. Can someone PLEASE help me? I need to go and I want to get the best seats possible. I have checked a few sites out but even Ticketmaster doesn't have when they actually go on sale listed. PLEASE PLEASE PLEASE HELP ME?!