Clap Your Hands Say Yeah, Ellie Goulding, tUnE-YarDs, Christina Perri and Bob Schneider are the latest additions to the fourth annual Outside Lands Music & Arts Festival. Clap Your Hands Say Yeah confirmed its appearance a little early when the group announced a series of dates along with a new studio album last Thursday. Outside Lands’s lineup also features Phish, Arcade Fire, Muse, The Black Keys, The Original Meters, Warren Haynes Band, John Fogerty, STS9, Girl Talk, The Decemberists, Greyboy Allstars and many others. The festival will return to San Francisco’s Golden Gate Park from August 12 – 14, 2011.