Well it looks like the conspiracy theorists were right!
Not two weeks ago, we covered a story that Calvin Harris and Taylor Swift fans were absolutely convinced that Swift had a small vocal part in Harris and Rihanna’s latest hit, “This Is What You Came For.” Another tangentially related theory supposed that Swift actually had writing credits on the song under a pseudonym, Nils Sjöberg.
A rep for Swift has confirmed that she has a writing credit in the song, and Calvin separately confirmed that she sang on it, as well. 
https://twitter.com/CalvinHarris/status/753256456711843840?ref_src=twsrc%5Etfw
https://twitter.com/CalvinHarris/status/753257779775668224
https://twitter.com/CalvinHarris/status/753258935432294400
https://twitter.com/CalvinHarris/status/753259239863296000
https://twitter.com/CalvinHarris/status/753259873035399168
