Equipped with his branded Tron and Space Invaders spaceship, Skrillex shot down the Honda stage and crowd in a never-ending bass drop spree. Older couples gyrated in the same fashion, frequency, and beat as the younger bros. Losing yourself to Skrillex clearly does not have an age requirement.

“She’s such a goddess,” awed the teenaged girl next to me upon her first glimpse of Lana Del Rey. Wearing a pea-green dress and prominent cross necklace, with buoyant hair curled to perfection, the 29-year-old singer looked like a picturesque Fifties housewife, straight from the reels of Mad Men.

There’s rarely a moment onstage when all seven members of the Avett Brothers band aren’t frenetically moving. Theirs remains a high-energy, raucous cascade of strings and stomps that propels equal enthusiasm from the crowd. As such, it’s earned the North Carolina outfit a place among the progenitors of the past decade’s folk-pop explosion.

At the close of the brightest summer of her career, Australian hip-pop diva Iggy Azalea presided over a dense, sunburned crowd Saturday afternoon at ACL Fest. Strutting center stage and flanked by a crew of dancers, the MC pulled from April debut The New Classic. Teenagers shunning each other in the audience rose on tip-toes to catch an eyeful.

Quite a culture clash, witnessing a band whose members you once saw walking the streets of New York City’s Lower East Side now magnified larger than 1,000 lives on a music festival Jumbotron.

On a day lousy with powerful female performers, Tune-Yards electrified the afternoon with technicolor energy.

Breakneck blues by Benjamin Booker turns out to be one hell of a way to kick a hangover in the teeth.

Though heartening to see so many kids crowding the front of the Samsung Galaxy stage, these teens and twentysomethings weren’t really there for Spanish Gold. They were staking out their early spots for the headliner, Eminem. They were rewarded with a particularly rocking set nonetheless.

They’re a greatest hits act – pure and simple – with nothing new since “I’m on It” in 2006. Straight heaters (“ATLiens,” “Ms. Jackson”), small chasers (André’s Love Below solo mid-set), a certified knockout (“Hey Ya”), then some Southernplayalisticadillacmuzik. Sing the state song (“Deep in the heart ...”) a cappella and close on “The Whole World.”