Four months after kickstarting a cultural phenomenon with her sixth album, Charli XCX invites friends and big-name acts to give it a new lease of life

NEW YORK (AP) — This is the way Brat Summer ends, not with a bang, but a Twitch livestream.On Thursday afternoon, hours after her deluxe, remixed, double-album version of her culture-shifting album “Brat” leaked – this one called “Brat and it’s completely different but also still brat” – and hours before it would be officially released, Charli XCX held a listening party/DJ event/livestream deep in New York’s Storm King Art Center, autumn leaves cascading down next to mammoth art installations. She stood beneath one of her own — a macro-scale version of the vinyl’s gatefold erected in her signature Brat green — and pressed play on a phone, commanding an activated crowd.This album (not to be confused with her previous re-release, “Brat and It’s the Same but There’s Three More Songs So It’s Not”) transforms some of the preexisting songs through features with starry collaborators like Billie Eilish, Ariana Grande, Lorde, Robyn and her tour mate Troye Sivan. That is the beauty of dance music, anyway: It has an ability…