Original: A mere two hours after Taylor Swift's rep confirmed that she co-wrote the Rihanna-featuring "This Is What You Came For" with ex-boyfriend Calvin Harris, the producer is attempting to take her down on Twitter.

News broke on Wednesday that Swift had used a pen name, Nils Sjoberg, to create "This Is What You Came For" so that her name wouldn't take attention away from the single. (You can even hear her singing on the yous at the 1:15 mark.) TMZ suggested that the couple, who were together for 15 months, broke up because he took their secret too far when he wouldn't admit to press that they would collaborate.

Calvin Harris Accuses Taylor Swift of Trying to 'Bury' Him Like Katy Perry