JB and Chloe headed out to celebrity hotspot Dstrkt in central London for the launch party of streetwear brand Fresh Ego Kid on Tuesday night (29 April).
JB was looking forward to a night of partying, telling fans on Twitter in the evening: "Phew! Long but productive day! Looking forward to a night on the town with @ChloeTangney SS/14 @freshegokidltd launch party @dstrktlondon x."
After bumping into JB inside, Sam, who is dating fellow X Factor star Tamera Foster, said: "Good to catch up with our main man JB tonight from JLS. Ain't seen this lad since the live shows!!!"
'Everybody In Love' singer JB, who announced his engagement to dancer Chloe in January, has only just recently returned from Marbella, Spain, where he held his stag do.
The celebrations were attended by his close friends and former JLS bandmates Marvin Humes, Aston Merrygold and Oritsé Williams.
JB rose to fame as one fourth of JLS after starring on The X Factor in 2008. JLS came in second place and went on to enjoy six successful years in the music industry with a string of chart-topping hits.
The boys announced their split last year with a 'Goodbye' farewell tour and greatest hits album. They played their last concert at London's O2 Arena on 21 December.
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Watch JLS' video for 'Billion Lights' below: