The reality stars joined a host of celebrities at the Microsoft game party held at the Boiler House in the Old Truman Brewery on Thursday night (13 March).
The party was a chance for the celebs to play the next generation multiplayer game, and of course, mingle with friends!
Chloe and Charlie soon bumped into chart-topping popstar John, who made his breakthrough in 2012 after featuring on Rudimental's hit single 'Feel the Love'.
'Love Me Again' hitmaker John happily posed for a photo with the siblings outside the venue. Posting a photo on Twitter, Charlie said: "With @Chloe_Sims and @JohnNewmanMusic #CoolGuy."
Charlie looked dapper in an all-black outfit teamed with a grey blazer, while Chloe looked chic in a black minidress, which was adorned with embellishments. She teamed her LBD with red killer heels and a black clutch bag.
Chloe and Charlie's TOWIE co-stars Jessica Wright and Ferne McCann were also in attendance, as well as Professor Green, Mathew Horne and The Voice UK coach Ricky Wilson.
It was a busy day for Charlie and Chloe, who had spent the morning filming in Sugarhut. The pair were holding a recruitment session and looked to be hard at work as they checked through countless CVs.
The potential candidates were being interviewed for Chloe's new business venture, as the mum-of-one will be opening up a new hair and beauty salon called Chloe's Beauty Bar.
Chloe announced the news earlier this week while telling her Twitter followers that she was looking to recruit stylists, beauty therapists and make-up artists.
Elsewhere, in the latest TOWIE episode, viewers saw Charlie meet up with on-off girlfriend Ferne McCann to discuss their future. Despite deciding to remain friends, the pair still shared a kiss, but after the show, Ferne confirmed that she and Charlie are just friends.
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