Last week we told you about a glitch in the Mayhem system, with several anxious fans poking around the website’s server in hopes of uncovering the festival’s official 2011 lineup. And as it turns out, they were right!

The Rockstar Mayhem Festival has officially announced Disturbed and Godsmack as this year’s headliners, with the mighty Megadeth providing direct support on the trek’s main stage.

Machine Head, In Flames, and Trivium will alternate between main stage opening slots, as well as headlining the secondary stages throughout the rotation. The “Extreme Stage” will spotlight Suicide Silence, All Shall Perish, and Straight Line Stitch, with the Jagermeister Stage housing Unearth, Kingdom of Sorrow, Red Fang, and local Jagermeister openers.

A number of guest appearances are slated to occur as well, including Dethklok’s performance in lieu of Megadeth on the July 9th San Bernardino stop. Additionally, Testament will replace In Flames on both the July 9th and 10th stops.

The festival will also encompass an assortment of daily activities, including video game stations, autograph signing sessions, and, according to organizers, “a slew of other interactive activities that enhance the concert experience.”

Rockstar Mayhem Festival Tour Dates:

07/09 – San Bernardino, CA @ San Manuel Amphitheatre
07/10 – San Francisco, CA @ Shoreline Amphitheatre
07/12 – Seattle, WA @ White River Amphitheater
07/13 – Boise, ID @ Idaho Center Amphitheatre
07/15 – Phoenix, AZ @ Cricket Wireless Pavilion
07/16 – Albuquerque, NM @ Hard Rock Casino Presents: The Pavilion
07/17 – Denver, CO @ Comfort Dental Amphitheatre
07/19 – St. Louis, MO @ Verizon Wireless Amphitheater
07/20 – Cincinnati, OH @ Riverbend Music Center
07/22 – Boston, MA @ Comcast Center
07/23 – Montreal, QUE @ Parc Jean Drapeau (no Megadeth)
07/24 – Hartford, CT @ The Comcast Theatre
07/27 – Holmdel, NJ @ P.N.C. Bank Arts Center
07/29 – Pittsburgh, PA @ First Niagara Pavilion
07/30 – Washington, DC @ Jiffy Lube Live
07/31 – Camden, NJ @ Susquehanna Bank Center
08/02 – Virginia Beach, VA @ Verizon Wireless V. Beach Amphitheater
08/03 – Raleigh, NC @ Time Warner Cable Music Pavilion at Walnut Creek
08/05 – Chicago, IL @ First Midwest Bank Amphitheatre
08/06 – Detroit, MI @ DTE Energy Music Theatre
08/07 – Indianapolis, IN @ Verizon Wireless Music Center
08/09 – Oklahoma City, OK @ Zoo Amphitheatre
08/10 – Dallas, TX @ Center
08/12 – Atlanta, GA @ Lakewood Amphitheatre
08/13 – Tampa, FL @ 1-800-Ask-Gary-Amphitheatre
08/14 – West Palm Beach, FL @ Cruzan Amphitheater

Tickets for each stop of the tour are currently available through the festival’s website.  For more information on the Rockstar Mayhem Festival, check out: