“Sentimentality, romance, and love have long been wheelhouse subjects for popular music, so it's no surprise pop is also littered with breakup songs. Robyn has written four classics to date: "Be Mine!", "With Every Heartbeat", "Dancing on My Own", and now "Call Your Girlfriend". On the first three, she's the wronged woman, and in many ways these tracks represent her most enduring guise: The tough w”