Calvin Harris rips Taylor Swift in Twitter rant
(CNN) -- Just when you thought Taylor Swift's breakup with DJ Calvin Harris was amicable and so last month, things have gone south Hiddleswiftly. The former couple apparently mixed business with pleasure and the result while catchy, isn't playing out pretty. A representative of Swift told People magazine Wednesday that the pop star secretly wrote the song "This Is What You Came For," under the pseudonym,"Nils Sjoberg." The hit, recorded by Harris and Rihanna, has been at the top of the charts all summer.