Rita Ora is NOT happy with her ex-boyfriend Calvin Harris!

Rita Ora is said to be less than impressed that her boyfriend announced their break-up over Twitter this weekend.

A source told The Sun that the singer was ‘mortified’ about the tweet, saying: “Rita was a little mortified that Calvin tweeted about the split but she’s just getting on with things.”

Calvin was seen hanging around with a group of models, prompting rumours that he was cheating on Rita, which is said to be the reason he wrote the tweet in the first place.

We’re not sure why Rita would be so embarrassed about Calvin’s announcement as he was more than gentlemanly in his words, perhaps she wanted to get there first!

Either way, break-ups are never easy so good luck to this pair!