We have all the exclusive details on her 365 Party Girl hair. Charli XCX's Brat is forever—literally ... actually," he confesses. "I blended pink and peach colored hair pieces into her hair ...

But I held my ground, and yeah, I still don't brush my hair." It doesn't stop at her hair. Charli XCX is adamant about helming her own career. "When it comes to something as personal as music ...