The 'Wings' singer slipped on an LBD with a plunging front to party at Rose Club in London on Thursday evening (25 July).
Leigh-Anne was all smiles when the couple emerged from the exclusive club just after 2am: obviously a good night, then!
Clearly Leigh-Anne has been enjoying the sweltering weather as she was sporting some bikini strap marks on her back.
She was obviously looking forward to her night out with Jordan, tweeting beforehand: "Bday celebrations tonight! Whoooop! #HappyBirthdayJordan."
Aside from a glam night out, Leigh-Anne also presented Jordan with a rather cool birthday cake shaped like a sports car and featuring personalised name number plates!
Leigh-Anne earlier professed her love for Jordan via Twitter, writing: "Happy birthday to my beautiful, amazing, gorgeous boyf Jordan! You mean everything to me, love you forever.. :) leigh x."
Earlier this week footage emerged of Leigh-Anne apparently getting smacked in the face by a bottle of soda while performing at a music festival earlier this week.
But ever the pro, the singer didn't skip a beat, calmly carrying on with the performance.
Watch Leigh-Anne's reaction to the bottle throw below:
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