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Saturday: Virgin Mobile FreeFest at Merriweather Post Pavilion

Virgin Mobile FreeFestZZ Top (music group)SantigoldNasBen Folds
2012 Virgin Mobile FreeFest headliners include: indie rocker Jack White, dubstep king Skrillex and rapper Nas. Festival's lineup also includes M83, ZZ Top, Santigold, Alabama Shakes, Ben Folds Five, the Dismemberment Plan, Das Racist, Portugal The Man, Trampled by Turtles and Allen Stone.... AFP/Getty Images