They dated for one year and seemed totally loved up, but then Taylor dumped him for Tom Hiddleston.
Now, Calvin Harris has enlisted the help of Taylor’s number one rival, Katy Perry, to get revenge on his ex.
He has announced he's releasing a new album via Twitter.
Taylor and Calvin shared a very public romance and seemed completely besotted with one another but broke up in June last year.
After the breakup, Taylor threw shade at her ex when revealing she was the one that had actually written the DJ’s hit with Rihanna This Is What You Came For.
Look’s like Calvin is having the last laugh by collaborating with Katy along with some other big names including Snoop Dogg, Nicki Minaj, Ariana Grande, Frank Ocean, John Legend and more.
Katy and Taylor fell out in 2014 after the country singer did an interview with Rolling Stone.
In the interview she confirmed her hit single Bad Blood was about Katy, adding she was never sure if they were friends.
“She would come up to me at awards shows and say something and walk away, and I would think, ‘Are we friends, or did she just give me the harshest insult of my life?’ [Then] she did something so horrible. I was like, ‘Oh, we’re just straight-up enemies.’ And it wasn’t even about a guy! It had to do with business,” Taylor told the publication.
In the wake of the interview Katy responded in a Tweet referring to Mean Girls.
Watch out for the Regina George in sheep's clothing...— Katy Perry (@katyperry) September 9, 2014
Will Taylor be able to shake this one off?