Oritsé and AJ stepped out on Thursday night (12 February) for the bash in London, which was hosted by 'Beneath Your Beautiful' hitmaker Labrinth.
Dancer and fashion designer AJ rocked a red leather-look dress and showed off a sleek, short hairdo as she posed alongside 'Beat Again' singer Oritsé, who dressed in an all-black outfit and navy jacket.
The couple, who welcomed their son Omré on 24 August last year, rubbed shoulders with the likes of James Arthur, Fuse ODG, Little Mix and Conor Maynard.
Oritsé, who has just returned from a trip to Los Angeles, announced last month that he would be performing under the name OWS to launch his solo career.
The video for his debut single 'Waterline' was unveiled in January and it features footage of a pregnant AJ. 'Waterline', which includes a guest verse from US rapper Pusha T, was first previewed on Jay Z's Life+Times blog in September.
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Watch the video for 'Waterline' below: