Continuing in her winning streak of girl power anthems, Charli XCX has announced a new single "Doing It" featuring fellow British babe Rita Ora. The forthcoming track, produced by Ariel Rechtshaid (Beyoncé, HAIM) and Mr. Rogers is a amped-up spin on the original version of the song. With fuzzy 80's synths, Charli's soaring vocals, and an entrancing hook,…