The fourth annual Roots Picnic will take place at Philadelphia’s Festival Pier at Penn’s Landing on Saturday, June 4. In addition to The Roots, this year’s festival will feature Nas, Wiz Khalifa, Esperanza Spalding, Aerial Pink, Man Man, The Dismemberment Plan, Mac Miller, Yelawolf, Little Dragon, J. Period, Nicos Gun and Donn T. The members of The Roots will back both Nas and Esperanza Spalding during their performances. The Roots’ sets with Public Enemy and the members of Antibalas at past Picnics have led to future collaborations.