Pearl Jam’s Fierce, Political Headlining Set Brings Lollapalooza 2007 to a Fitting End Lollapalooza’s day three special collaboration arrives courtesy of My Morning Jacket, which welcomes the Chicago Youth Symphony Orchestra as a backing band. Jim James and company are dressed for the occasion, looking dapper in three-piece suits (sans ties). Clutching a Flying V guitar, James gets his ya-yas out, scooting across the platform like a pinball...