NAMPA/IDAHO – JULY 2: Mastodon guitarist Bill Kelliher plays during the Rockstar Mayhem Festival in Nampa, Idaho July 2nd, 2013

NAMPA/IDAHO – JULY 2: Mastodon guitarist Bill Kelliher plays during the Rockstar Mayhem Festival in Nampa, Idaho July 2nd, 2013

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NAMPA/IDAHO – JULY 2:Guitarist from Mastodon, Brent Hinds on his guitar during the Rockstar Mayhem Festival in Nampa, Idaho July 2nd, 2013

NAMPA/IDAHO – JULY 2:Guitarist from Mastodon, Brent Hinds on his guitar during the Rockstar Mayhem Festival in Nampa, Idaho July 2nd, 2013

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NAMPA/IDAHO – JULY 2: Bill Kelliher from Mastodon on the stage while he performs at the Rockstar Mayhem Festival in Nampa, Idaho July 2nd, 2013

NAMPA/IDAHO – JULY 2: Bill Kelliher from Mastodon on the stage while he performs at the Rockstar Mayhem Festival in Nampa, Idaho July 2nd, 2013

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NAMPA/IDAHO – JULY 2: Troy Sanders from mastodon providing backup vocals while playing his jaguar bass guitar at the Rockstar Mayhem Festival in Nampa, Idaho July 2nd, 2013
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NAMPA/IDAHO – JULY 2: Troy Sanders Of Mastodon on stage with his Jaguar bass at Mayhem Festival in Nampa, Idaho July 2nd, 2013
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