Double take! Charli XCX turns heads in underwear at Grammy after party But on Sunday, Charli XCX - real name Charlotte Aitchison - exceeded all expectations as she attended the Warner Music Group Grammys after party. The 24-year-old British singer wore a slip dress from Moschino's spring 2017 ready-to-wear line, a highly ironic number that was designed as part of a larger commentary on current social media culture.