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Motorhead are currently playing the traveling Mayhem Rockstar Energy Drink Mayhem Festival, along with fellow headliners Slipknot, Slayer and Anthrax.

The all-day outdoor festival recently launched in San Bernardino, California and will hit 27 cities across the States by the time it wraps up on August 5 in Hartford, CT.

Each festival date features 12 of the biggest names in hard rock and heavy metal, performing on two stages, as well as other attractions.

On Tuesday, the tour rolled into Auburn, Washington, where Motorhead were joined by Duff McKagan for a performance of “Killed By Death.”

“Great time w/2 of my nephews at the Mayhem Fest in Seattle 2nite,” tweeted Duff after the show. “Motorhead/Slayer/Anthrax/ Slipnot?!! I was voted best Uncle of the nite.”