GALLERY: Lollapalooza 2015 Chris KiesAugust 7, 2015Three days of guitar highlights from Chicago’s world-renowned festival.Zella Day The 20-year-old songwriter brought a new-age brand of Americana and showed off some chops on her Gretsch 6121 Roundup during her set on the Pepsi sidestage.featured-storiesgearsturgill-simpsonthe-war-on-drugsgear-galleriesalabama-shakesspecial-featured-storiesgary-clark-jrmetallicalollapaloozawhats-newGearGear Galleries