Popsugar Entertainment Summer Entertainment Summer Music Festivals 2019 27 Music Festivals That Are Bringing the Heat This Summer 24 March 2019 by Brea Cubit View On One Page Photo 14 of 27 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 14 Roots Picnic Where: Philadelphia When: June 1 The headliners: H.E.R. and 21 Savage Why we're excited: You get to go for the phenomenal performances and stay for the delicious food that Philly has to offer. See the full Roots Picnic lineup. Previous Next Start Slideshow Summer EntertainmentMusic FestivalsMusicSummer