The playful feud between Green Day and Charli XCX lit up Coachella weekend two, continuing the viral buzz from their shared headline slot. After Charli wore a cheeky “Miss Should Be Headliner” sash during an afterparty on April 13, Green Day’s Billie Joe Armstrong fired back by sporting a fan’s “Brat” hat onstage during their April 19 set. Drummer Tré Cool joined the fun with a handmade sash reading “Actual Headliner,” complete with pink eye makeup and color-coordinated accessories.

Charli, clearly amused, reposted the look on X, writing, “obsessed.” Her second Coachella set didn’t disappoint—she brought out Addison Rae for a “Von Dutch” remix, and was joined by Billie Eilish, Lorde, and Troye Sivan for standout performances from her Brat era.

The 32-year-old pop innovator closed with a cryptic on-screen message questioning the end of “Brat Summer”—though with Glastonbury, LIDO Festival, and Parklife ahead, it’s far from over.