Hermansen, Steve Mac Mixing – Rob Orton Engineering – Chris Laws, Dann Pursey, Tony Lake Producing – Cashmere Cat, Stargate, Steve Mac Programming – Cashmere Cat Bass – Steve Pearce Drums – Chris Laws Guitar – Dan "Robopop" Omelio Keyboards – Steve Mac Percussion – Daniel Pursey Vocals – Bea Rexstrew, Charli XCX, Katie Littlewood, Kirstin Hume, Macy McCutcheon Charts Weekly charts Year-end charts Certifications Release history References External links 2014 singles 2014 songs Atlantic Records singles Charli XCX songs Music videos directed by Marc Klasfeld Songs about drugs Songs about school Songs written by Charli XCX Songs written by Robopop Songs written by Steve Mac Songs written by Tor Erik Hermansen Songs written by Mikkel Storleer Eriksen Songs written by Cashmere Cat Song recordings produced by Cashmere Cat Song recordings produced by Stargate (record producers) Song recordings produced by Steve Mac