It's proven one of the biggest pop hits of the year so far, but no one knew that Taylor Swift was partly responsible for it - until yesterday.
Calvin Harris revealed that not only was Swift a co-writer on 'This is What You Came For', but she also contributed backing vocals.
And she sings on a little bit of it too 🙃
Amazing lyric writer and she smashed it as usual https://t.co/vW3yGOIJit— Calvin Harris (@CalvinHarris) July 13, 2016
Now, someone with too much time on their hands has gone through the song to try to figure out which bits Swift sings, in between Rihanna's main vocal.
Fans have speculated that she sings the last (longer) 'ooh' at 0:18 (a loop that is repeated throughout the track), which you can hear below:
