It looks like following her split from boyfriend Calvin Harris, Rita Ora was left "mortified" at the end of their romance.

According to Entertainment Wise, while she seemed to be in great spirits up on stage at the Capital Pride Festival over the weekend deep down inside she was slightly livid.

Rita performed at the event held at the National Mall in Washington DC following the announcement of her break up from the talented DJ.

Her performance comes after Harris decided to confirm the end of their romance by tweeting about it although she has kept quiet about the split.

A source told The Sun, "Rita was a little mortified that Calvin tweeted about the split but she's just getting on with things."

On June 6th the DJ tweeted, "To address speculation - myself and Rita ended our relationship some time ago. She is a beautiful, talented woman & I wish her all the best."

Since the breakup Ora has been spending a lot of time with Justin Bieber and his crew, particularly his friend, Khalil Amir Sharieff who she got close during her time in Mexico.

An insider admitted, "She has been with Khalil but who knows how long it will last?"

As for her break up with Calvin Harris a source revealed, "A lot of things worked against her and Calvin, such as distance and hectic work schedule."

The "R.I.P." artist previously told The Mirror about how hard it can be to make a long distance relationship work.

Rita Ora explained, "You have to fly each other out, you just have to," adding, "Sometimes you fly for 20 hours, sometimes you only fly for five hours. It's an effort, but you make it work."

She revealed, "I'm not a fan of long distance relationships," adding, "If you had a choice, you want that person with you. It makes me pretty sad. But you work with what you've got."

What are your thoughts on Rita Ora and Calvin Harris' split? Let us know in the comment section below.