This year's Hangout Festival is once again packed with top performers from the industry. Tom Petty and the Heartbreakers and Kings of Leon will headline, and other acts include the Trey Anastasio Band, The Shins, Kendrick Lamar, Dirty Projectors, moe., Gov’t Mule, Slightly Stoopid, and dozens of others. Be sure to check the rest of the lineup, including the official announcement video, here.