Lucy DacusLucy Dacus already had a presence at Outside Lands before her own Saturday performance. With two-thirds of boygenius suddenly occupying the Lands End stage, the pair performed “True Blue” together before Baker also joined Dacus for “Bullseye.” The xxAs evening settled over Golden Gate Park, The xx brought a noticeably different kind of energy to Lands End. Less than 24 hours after headlining Lands End herself, Charli xcx returned to Outside Lands to join The Strokes for “Take It or Leave It.” If Friday established the scale of Outside Lands, Saturday demonstrated what happens once that scale is fully activated.