Photos by Daniel DeSlover

For additional information on Summerfest, Tom Petty & The Heartbreakers and Slightly Stoopid, visit Summerfest.com, TomPetty.com and SlightlyStoopid.com.

Related Articles

Pink, Andy Grammer and more: Summerfest at Henry Maier Festival Park The Chainsmokers, Alessia Cara and more: Summerfest at Henry Maier Festival Park T-Pain, Phillip Phillips and more: Summerfest at Henry Maier Festival Park Future, Big Sean and more: Summerfest at Henry Maier Festival Park Sheryl Crow, Jason Isbell and more: Summerfest at Henry Maier Festival Park Zac Brown Band, Bebe Rexha and more: Summerfest at Henry Maier Festival Park Joss Stone, Jon Bellion and more: Summerfest at Henry Maier Festival Park Luke Bryan, Brothers Osborne and more: Summerfest at Henry Maier Festival Park