An Ibanez guitar representative may have leaked some top secret info at this weekend's National Association of Music Merchants (NAMM) when he casually named Slipknot as a headliner on Mayhem Fest.

Every year thousands of aspiring and professional musicians converge on NAMM in Anaheim, California -- it's sort of like Comic-Con for musicians. NAMM gives vendors a chance to show off their latest instruments and often times well-known musicians appear to endorse their own signature series products. A rep for Ibanez guitars was showing off Slipknot guitarist Mick Thomson's signature axe when he volunteered a bit too much info on where the guitar will soon be played.

In the video below you can see Ibanez rep Russ Rosenfeld accidentally say that Slipknot is headlining this year's Rockstar Mayhem Festival, which kicks off in late June. This matches up with Slipknot's previous statements about their intention to tour the U.S. this summer.

There are also rumors that Metallica and Black Sabbath will join Slipknot on a tour of some sort this year, the latest news has some speculating it could be Mayhem Fest. If this is true, it would be hard to believe that Slipknot is headlining over either of those two acts. We will know for sure who's in and who's out when the official lineup for the 2012 Rockstar Mayhem Festival is announced tomorrow (January 25th).

2012 Mayhem Festival Tour Dates

06/30 – San Bernardino, CA
07/01 – San Francisco, CA
07/03 – Seattle, WA
07/06 – Phoenix, AZ
07/07 – Albuquerque, NM
07/08 – Denver, CO
07/10 – Dallas, TX
07/11 – Houston, TX
07/13 – Tampa, FL
07/14 – Atlanta, GA
07/15 – Indianapolis, IN
07/18 – Oklahoma City, OK
07/20 – St. Louis, MO
07/21 – Chicago, IL
07/22 – Detroit, MI
07/24 – Cincinnati, OH
07/25 – Cleveland, OH
07/27 – Philadelphia, PA
07/28 – Pittsburgh, PA
07/29 – Washington, DC
07/31 – Saratoga, NY
08/01 – Buffalo, NY
08/03 – Boston, MA
08/04 – Scranton, PA
08/05 – Hartford, CT