VIDEO : Taylor Swift Penned Calvin Harris' 'This Is What You Came For'

It turns out that Taylor Swift co-wrote her ex-boyfriend Calvin Harris' smash hit "This Is What You Came For".she did so under the pseudonym Nils Sjoberg.
Spurces close to the singer confirmed that Swift had penned the EDM hit. Swift had done some early promotion for the track before it was released wearing a jacket featuring the single's cover art at Coachella.