For its fourth year, Lollapalooza's pop-up store opens at Block 37 just in time for the music festival madness. You don’t need to be a Lolla ticket holder to access this store's selection of branded merchandise. LollaShop offers up official festival T-shirts, posters and an assortment of clothing and accessories. Items from Chicago favorites like BucketFeet and Souldier are interspersed among products from Brooklyn Cloth and Grassroots California. The store will be open between July 24 and August 2.