(Green Day notably released a song called "Brat" on their 1995 album Insomniac.) Cool, 52, was photographed wearing a makeshift sash that read "actual headliner." Charli, 32, didn't seem bothered ...

Green Day drummer Tré Cool has responded to Charli XCX by sporting an “Actual Headliner” sash at Coachella this weekend. The ‘Brat’ star ruffled some feathers last week when she was seen ...

Finally, Green Day did respond, and in characteristically cheeky and slightly self-deprecating fashion. At some point, a photo surfaced online of drummer Tré Cool wearing a sash of his own ...