It's been rumoured for years that Swift and Katy don't get along, which led to speculation that her song Bad Blood was about their relationship. But, he went on to acknowledge that it was "hurtful" for her team to make him "look bad".
Harris then took a swipe at Swift and her new boyfriend, actor Tom Hiddleston, 35, (Thor, The Avengers) who have been nauseatingly flaunting their PDA across the globe since they began dating just weeks after Harris and Swift called it quits.
Jedward have nailed their colours to the mast in the ongoing feud between Taylor Swift and Calvin Harris. Last night, Katy Perry dug into that archive for what's believed to be her response to the drama between Calvin Harris and Taylor Swift.
He further added that Taylor wanted it to be a secret that is why there was a pseudonym.
Harris alluded to Swift's infamous feud with the "Firework" singer while defending himself Wednesday after Swift took credit for his chart-topping hit.
Yesterday the Scottish DJ posted a series of Tweets aimed at Taylor Swift, and now he has done it again but this time had a change of heart. "I figure if you're happy in your new relationship you should focus on that instead of trying to tear your ex bf down for something to do".
And finally. "Please focus on the positive aspects of YOUR life because you've earned a great one. God bless everyone have a lovely day".
On March 7, Daily Mail reported that "He doesn't want to rock the boat: Calvin Harris "politely declined" collaboration with girlfriend Taylor Swift over fears it would destroy their relationship".