Writer: Levi Lennox, Anthony Hannides, Mike Hannides, Zayn Malik, Bonnie McKee, Henry Walter, Max Martin, Lukasz Gottwald, Katy Perry
Composer: Levi Lennox, Anthony Hannides, Mike Hannides, Zayn Malik, Bonnie McKee, Henry Walter, Max Martin, Lukasz Gottwald, Katy Perry
