Was Calvin Harris’ outburst at his ex Taylor Swift real or just a PR stunt?

Calvin Harris’ flurry of Taylor Swift-centric tweets last week was a glorious sight to behold, if only because it’s always entertaining to see a celebrity go off script. And with Harris calling out his ex-girlfriend’s team for making him look bad – and the singer herself for trying to “bury” her nemesis Katy Perry – it certainly looked like he was breaking all the rules in Swift’s carefully orchestrated world.

Or was he?

Though Swift has dated several famous stars, it’s extremely rare that they ever have a negative thing to say about her. Harris changed that last week after TMZ and People confirmed Swift actually wrote Harris’ hit summer song, This is What You Came For, under the pseudonym “Nils Sjoberg”. Apparently annoyed that Swift’s team tried to make it look like she was the brains behind the operation, Harris confirmed she wrote the track, but shot back on Twitter that “I wrote the music, produced the song, arranged it and cut the vocals though.”

Then he went further: “Hurtful to me at this point that she and her team would go so far out of their way to try and make me look bad at this stage though.”

Then he took a shot at her new boyfriend, actor Tom Hiddleston: “I figure if you’re happy in your new relationship you should focus on that instead of trying to tear your [ex-boyfriend] down for something to do.”

Then he threw down the gauntlet: “I know you’re off tour and you need someone new to try and bury like Katy [Perry] but I’m not that guy, sorry. I won’t allow it.”

Swift is such an image-control pro that it is extremely unusual for anyone in her universe to go rogue – especially about sensitive topics like her reported feud with Perry, the assumed target of Swift’s smash Bad Blood.