12. "This Is What You Came For" (with Calvin Harris) (2016)
"This Is What You Came For" is the closest we've gotten to a Rihanna–Taylor Swift mashup. The third collaboration between Rihanna and Calvin Harris, five years after "We Found Love," the track is a more subdued effort from the pair – thanks to softer, manipulated vocals and a blend of traditional EDM, tropical and Chicago-house elements. A "nervous" Harris played the final cut to Rihanna at Coachella 2016. "I changed so many bits from when she first heard it," Harris said at the time. "She was into it." Rihanna nearly got pulled into Harris' summer 2016 beef with ex-girlfriend Swift, when it was later confirmed that she co-wrote the smash under her pseudonym Nils Sjöberg, and even sings a bit during the chorus. After it was suggested that he failed to give Swift due credit, Harris lashed out in a since-deleted Twitter rant. "I wrote the music, produced the song, arranged it and cut the vocals. And initially she wanted it kept secret, hence the pseudonym." So much drama (none of it Rihanna's) for such a blissed-out earworm.