GUESS (with Charli XCX)

A seismic departure into full-throttle club energy, this collaboration detonates with a distorted bass drop and four-on-the-floor kick that immediately signals Charli XCX's hyperpop fingerprints all over the production. The beat is aggressive and industrial-adjacent — crunchy synthesizer stabs, pitch-shifted vocal chops, and a tempo that pushes bodies into motion without asking permission. Billie Eilish matches Charli's manic energy with a brasher, more confrontational vocal delivery than her usual intimate style, trading whispers for declarations dripping with playful arrogance. The two voices weave around each other with competitive chemistry, each pushing the other louder, bolder. Lyrically the track revels in provocative cheekiness and body confidence, turning the male gaze inside out with gleeful irreverence. The production references early 2010s blog-house and late-2020s rave revival equally, crunching everything through a filter of digital maximalism. This is where two of pop's most influential young architects meet on the dance floor and decide to tear it apart. It demands festival main stages, sweaty basement parties, pregame playlists at full volume. The kind of song that makes you check the rearview mirror because you are definitely speeding, windows down, summer night air rushing in.