Charli's band changed Taylor's original bubble gum sound to a more serious one, by adding bass and an extra guitar riff. It's definitely cool to listen to if you just aren't into the pop-ness of Taylor's tune but appreciate her lyrics.
We're surprised Charli covered Tay's song. You know, she IS opening up for T-Swift's enemy Katy Perry on her upcoming Prism tour.
Taylor recently showed Charli some love, though. She added her song onto a list of awesome breakup songs for a sad fan to listen to.
Check out Charli XCX's cover of "Shake It Off" below. Prefer her version or Taylor's version?