By Scottie Andrew, CNN (CNN) — It’s nearly summertime, and we’re all doomed. So says Charli XCX, who’s abandoned the party in her new music and trained her gaze instead on death and destruction: “The world is gonna end, no hope for any of it,” she sings in “SS26,” her latest single. Charli and preeminent pop divas Olivia Rodrigo and Ariana Grande are releasing some of the bleakest music of their careers just in time for summer, the traditional s…