Charvel signature artist Warren DeMartini joined RATT bandmates, singer Stephen Pearcy and bassist Juan Croucier for a “surprise band” performance on Saturday night on the Monsters of Rock Cruise West. Quiet Riot guitarist Carlos Cavazo, who played on RATT 2010 studio album Infestation, and drummer Jimmy DeGrasso (Y&T, White Lion and Megadeth) also joined them onstage.

Watch fan footage below as the band plays RATT’s “Wanted Man” …