Taylor Swift and Calvin Harris both came out from a high-profile relationship before they started dating.
The Scottish DJ has completely moved on from supermodel Aarika Wolf and singer Rita Ora while the Grammy Award-winner seemed to be having a hard time moving on from Harry Styles.
The 25-year-old singer may not want to admit that she's still bitter over her breakup from the One Direction member, but her recent action says it all.
According to Hollywood Life, Taylor indirectly dissed her ex-boyfriend Harry on Tumblr by liking and later on unliking a post of a fan.
"If you think Calvin is a bad person but you keep sending him hate on SM, you are just as bad as you think he is," the fan wrote. "He is the man Taylor chose to be with, I'm sorry if you live in fantasy land and you think this relationship is a cover up or if you think that a relationship that has been f***ing dead for years is gonna 'rise' (with a dude who had no maturity at all)."
Haylor fans noticed what the "Bad Blood" hitmaker did and were infuriated by her actions, but the British heartthrob wasn't that affected by it.
"Harry is more amused than upset with the claim that Taylor liked a post, which said he was immature," an insider said.
"He's not quite sure why she would still be mad at him. He doesn't have any hard feelings towards Taylor and hopes that one day they can be friends and that she can forgive him for ending their relationship. He knows it was hard on her, but figured she would be long over it by now," their source added.
What Taylor Swift did got Calvin Harris worried because this means that she still has feelings for Harry Styles.
"Calvin has separated himself from his playboy ways and is all in with his relationship with Taylor," an insider explained to Hollywood Life.
"He doesn't like when she mentions her exes. He wants her to not talk about them, even if it's her throwing shade at them. He wants her to be totally devoted to him. He gets jealous thinking that she still may have feelings for people like Harry or others she has dated - it's upsetting to him," their source added.