At London’s O2 Arena on Thursday night, “Brat” wasn’t just a word, or the name of Charli XCX’s wildly successful album — it was a way of life. Looking out at the sea of people who packed the sold-out show,

Charli XCX debuted a number of fan favorites during her Manchester and London shows, paying tribute to late friend and collaborator SOPHIE in the process.

Charli XCX turned London’s O2 Arena into a dazzling celebration of music, fashion, and self-expression on Thursday night, as she delivered an electrifying performance to a sold-out crowd.