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King of Summer - Festival season is upon us and it's only a matter time before your favorite artist is performing in a stadium or open field near you.  This weekend, 2015 BETX headliner, Kendrick Lamar hit the stage at the Bonnaroo Music and Arts Festival in Manchester, Tennessee. His throwback set made OG fans happy and converted any newbies who've been living under a rock. Read on to who else hit the stage during the 4-day long event. (Photo: Jason Merritt/Getty Images)

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Red Light Special - Childish Gambino looks like he may have picked up some performance tips from his new role in the Magic Mike XXL sequel.(Photo: Josh Brasted/WireImage)

Photo By Photo: Josh Brasted/WireImage

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The Best of Me - SZA digs deep, delivering a stirring performance onstage at "The Other Tent" during the SuperJam on Day 3 of Bonnaroo.(Photo: FilmMagic/FilmMagic for Bonnaroo Arts And Music Festival)

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Soul Food - Gary Clark Jr. brings his modern bluesy gumbo of soul, funk and R&B to the "Which" stage.(Photo: Jason Merritt/Getty Images)

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The Revival - D'Angelo continues to spread the gospel of his new band, The Vanguard performing onstage at "This Tent" during Day 3.(Photo: FilmMagic/FilmMagic for Bonnaroo Arts And Music Festival)

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The People's Champ - Star on the rise Dej Loaf shows off her best "Try Me" flex for fans during her performance.(Photo: Tim Mosenfelder/Getty Images)

Photo By Photo: Tim Mosenfelder/Getty Images

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Get On Your Feet - Chi-town MC Chance the Rapper gets the crowd lifted performing on the "Other" stage.(Photo: Jason Merritt/Getty Images)

Photo By Photo: Jason Merritt/Getty Images

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Let's Groove - Legendary musicians Verdine White, Philip Bailey, and Ralph Johnson of Earth, Wind & Fire give the element of surprise, taking the stage with Kendrick Lamar and Chance the Rapper.(Photo: Jeff Kravitz/FilmMagic for Bonnaroo Arts and Music Festival)