Charli XCX surprised the crowd at Lollapalooza on day two, joining Lorde during her headlining set to perform their collaboration 'Girl, So Confusing.' The appearance came shortly after the release of Charli XCX's new album, 'Music, Fashion, Film,' which debuted at No. 1 on the U.K. Albums Chart. It is her second album to reach the top spot in a matter of months.
During the set, Lorde paused the show after fans passed out. Charli XCX later described the joint performance as making the song feel more special, congratulating Lorde on headlining and thanking her for the invitation.
The festival appearance marked Charli XCX's first at a festival since the album's release, and her performance alongside Lorde was a highlight of the day's rock-heavy lineup, which also included Smashing Pumpkins.