Elton John, Mumford & Sons, Black Keys to Headline Outside Lands 2015

Elton John, Mumford & Sons and the Black Keys will headline this summer’s Outside Lands Festival, set to invade San Francisco’s Golden Gate Park August 7th through 9th. Filling out the impressive bill at the eighth annual fest are Kendrick Lamar, Sam Smith, Wilco, Tame Impala, D’Angelo and the Vanguard, St. Vincent,…