What line did Kurstin recall from the script ?
Personnel Songwriting – Katy Perry , Sia Furler , and Greg Kurstin ; Production – Greg Kurstin ; Mixing – Manny Marroquin ; Engineering – Greg Kurstin and Jesse Shatkin ; Additional engineering – Alex Pasco ; Assisting – Chris Galland , Delbert Bowers ; Guitar , keyboards and programming – Greg Kurstin .