Popstar Rita, who is good friends with Vas, was all smiles as she partied with a group of a friends at Cirque le Soir nightclub in London.
Rocking short cropped hair and a black Public Enemy print vest top, Rita flashed a smiles as she posed with her pals.
Taking to Twitter, she said: "London family. We're back!!"
Vas, who has just returned from Greek island Mykonos where he was holidaying with his BFF Chloe Green, also posed for another photo with Rita and her friend, simply saying: "My girls".
Rita, 23, hit the headlines this week after explaining why her performance at last Sunday's Teen Choice Awards was cancelled at the last minute.
Rita's chart-topping hit 'I Will Never Let You Down' was written and produced by her boyfriend at the time Calvin, and she was due to perform this song at the awards ceremony.
But in a recent interview, Fifty Shades Of Grey actress Rita revealed her disappointment after claiming that Calvin "didn't approve" her TCAs performance, as he owns full creative rights to the song.
However, Rita's remarks didn't go down too well with Calvin, who hit back on Twitter and defended his decision not to let her perform, telling fans that he "had a damn good reason".
Rita and Calvin publicly addressed their split in June after one year of dating.
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Watch the video for 'I Will Never Let You Down' below: