On the last night of the tour in Seattle on October 23, Sivan sent us all wild when he performed the viral "Apple" dance from XCX's recent album. He joined a group of people wearing the ever popular green "BRAT" shirt as they danced along.

At the center of this cultural movement is some very good fashion: Saint Laurent! Martine Rose! McQueen! Over 100 pieces made by over 40 different designers. And at the heart of it all—albeit behind the scenes—are two talented, pop culture-savvy stylists.

BRAT by Charli xcx is one of contemporary music's most significant pop phenomena. That may seem like a hyperbolic statement, given how vast the world of Western pop music is, but it becomes less ridiculous when looking at the chart success,

Nothing major has truly changed about the nature of Charli XCX's live show over the past decade-plus years, only the context. At the heart her performances are raw, unencumbered manifestations of her songs - the zoom of fast cars,