The fourth single , `` Cross You Out '' featuring Sky Ferreira , was released on 16 August , followed by the fifth single , `` Warm '' , featuring American pop rock band HAIM , on 30 August , and the sixth single “ February 2017 ” , featuring Clairo and Yaeji , on 6 September.
Charli XCX fifth single is `` Warm '' , her sixth single is “ February 2017 ” .