Rockstar Energy Drink Mayhem Festival, the heralded hard rock and metal event of the summer, is swiftly becoming the heavy music fans’ summertime rite of passage. Today, the 4th annual summertime juggernaut announces the 2011 line-up with DISTURBED, GODSMACK and MEGADETH, joined by MACHINE HEAD, IN FLAMES, TRIVIUM, and many more of today’s most electrifying artists.

The tour will make a 26 date trek across the country beginning on July 9th at the San Manuel Amphitheater in San Bernardino, California. Stay tuned for up-to-date ticketing information.

This summer’s mainstage artists, Disturbed, Godsmack, and Megadeth, will be joined by a ferocious mix of the best hard rock and metal artists of today. For the first time in festival history, through their success, In Flames, Machine Head and Trivium have grown through the ranks to now perform on the mainstage in rotating slots throughout the tour.

Rockstar Energy Drink Mayhem Festival is thrilled to see the return of festival veterans Disturbed, Machine Head, Trivium and SUICIDE SILENCE.

The Jagermeister stage will feature UNEARTH, KINGDOM OF SORROW, RED FANG, and the winners of the Jagermeister Battle of the Bands. The Extreme Stage will spotlight Suicide Silence, ALL SHALL PERISH and STRAIGHT LINE STITCH.

The 4th annual Rockstar Energy Drink Mayhem Festival will also feature Rockstar Metal Mulisha Jump Team, the World’s Greatest Freestyle Motocross team.

“Strap yourself in and hold on tight, cuz this ride goes reeeeeal fassst this summer,” exclaims Godsmack vocalist Sully Erna. “Godsmack/Disturbed, Mayhem Festival!! Can't Fu@?kin' wait!!!”

Mainstage guitarist Dan Donnegan of Disturbed emotes, “Disturbed is looking forward to being part of the biggest summer tour in the U.S. this year. It's been years since we shared the stage with Godsmack and we've been wanting to team up with them and join forces for a longtime. Megadeth has been a big inspiration to us and we are looking forward to the other bands rounding out what seems to be a solid bill.”

Also, mainstage performer Megadeth's lead guitarist and frontman Dave Mustaine adds, “This is going to be a helluva hot summer, and you can get ready for true Mayhem this year.”

“Machine Head are thrilled to once again be a part of what has become the undisputed king of metal and rock festivals in the US, MAYHEM,” states Machine Head frontman and guitarist Robb Flynn. “Our run headlining the Jagermeister stage in 2008 was one of the wildest and most inspiring tours we have ever been a part of. We became friends with so many great bands and Mulisha dudes. We all partied, and rode what would become an incredible wave of momentum for Machine Head. The vibe on the tour was filled with an impressive amount of goodwill due to the attention to detail and hard work of John Reese and Kevin Lyman. Machine Head will do everything in our power to make this f*