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Calvin Harris Just Went IN On EX Taylor Swift On Twitter! (See Why Below)

Taylor Swift tries to take credit for making Calvin's latest single "This Is What You Came For" a hit!

She says that Calvin tried to down play her role in the songs success, by claiming she's the 1 that came up with the catchy melody!

Calvin had a few words for his EX! See his tweets below!


I think it's safe to say those 2 wont be getting back together!