James Hetfield of Metallica
Gag performs at Power of the Riff 2016
Papa Emeritus III of Ghost
Abbath
Boris
Brent Hinds of Mastodon
Kirk Hammet and James Hetfield of Metallica
Jason Derulo
Ghost
Steve Von Till of Neurosis
Kerry King of Slayer
Niklas Kvarforth of Shining
Gwen Stefani of No Doubt
Wolves in the Throne Room
Simone Simons
Ghost