Charli xcx met Addison Rae years ago, when the TikToker-turned-artist was first starting to write songs. Since then, the two have traded features on each other's work: Charli guested on Rae's early ...

Reinvention is an unusual concept to apply to someone at the beginning of their career. Transformation usually follows a clear introduction — a breakout role, a first book, a memorable performance.