Justin Bieber performs surprise acoustic gig in beleaguered Los Angeles park

Small crowd enjoys singer’s free concert in MacArthur Park, which has often drawn headlines for less cheery reasons With no announcement and little fanfare, Justin Bieber performed a free acoustic set on Monday at a Los Angeles park often in local headlines for less cheery reasons. In videos that surfaced online, four musicians flanked the global phenom, who wore a plain T-shirt and shorts as he s…