© Licensed to London News Pictures. 29/05/2014. Barcelona, Spain.   Queens of the Stone Age performing live at Primavera Sound Festival .   Queens of the Stone Age is an American rock band consisting of  founder Josh Homme (lead vocals, guitar, piano), Troy Van Leeuwen (guitar, lap steel, keyboard, percussion, backing vocals), Michael Shuman (bass guitar, keyboard, backing vocals), Dean Fertita (keyboards, guitar, percussion, backing vocals), and recent addition Jon Theodore (drums, percussion).   Primavera Sound, or simply Primavera, is an annual music festival that takes place in Barcelona, Spain in late May/June within the Parc del Fòrum leisure site. Photo credit : Richard Isaac/LNP