Taylor Swift wrote 'This Is What You Came For' under a pseudonym

Turns out Taylor Swift has even more hits than we originally thought.

The singer's rep confirmed a TMZ report on Wednesday that Swift wrote ex-boyfriend Calvin Harris' summer single collaboration with Rihanna, "This Is What You Came For."

"Taylor Swift wrote 'This Is What You Came For' under the pseudonym Nils Sjoberg," the spokesperson told Mashable.

"After recording a full demo, [Taylor and Calvin] agreed to keep the collaboration on the down-low, but Swift was hurt after Harris did an interview and said he couldn't foresee working with his then-girlfriend in the future" People notes.

When she's not secretly writing Billboard smashes, Swift these days is traveling the globe with her latest paramour, the actor (and possible next James Bond) Tom Hiddleston. Swift's fans are hoping for a new album from her later this year, but as of now her only music commitment is an October concert at a Formula 1 race.

Update: Calvin Harris responded on Twitter.