version "of us."" "Fire Up the Blades" was ultimately released in Japan on May 28, 2007, and worldwide on June 26, 2007. During the 2007 Ozzfest Tour, Jamie Hooper was unable to sing with the band as he was experiencing throat problems, and was warned by doctors that he may damage his voice permanently if he did not rest it. He did not perform on the Ozzfest tour nor the Operation Annihilation tour. Harsh vocal duties were taken over by guitarist Justin Hagberg. Hooper did not perform with the band for the whole 2007-08 year.