The brunette duo - who appeared together on Celebrity Big Brother - joined the likes of Lucy Mecklenburgh and Cheska Hull at a swanky party held at the Sanctum Soho Hotel to celebrate the new perfume by boy band Union J.
Clearly loving this year's monochrome trend, both ladies opted for neutral ensembles with Casey wearing a textured white minidress (£42 from Rare London) featuring a flirty peplum hem and demure halterneck design.
The glamour model added inches to her sunkissed pins with a pair of patent nude pointed heels complete with gold studs on the straps, while toting a rectangular clutch by Saint Laurent.
And Casey - who recently had her breasts reduced from a GG to a EE cup - upped the glam on the beauty front by lining her peepers with heaps of black kohl pencil, adding sweeps of bronzer and a glossy nude pout.
Meanwhile, businesswoman Luisa looked equally fab in a sheer white cut-out top teamed with an itsy-bitsy black miniskirt.
Unlike Casey, Luisa added a flourish of colour to her ensemble by toting a satsuma orange Hermès Birkin bag, finishing her look with statement blue, black and white lace-up heels.
And it sounds like the duo had plenty to chat about as they made their way to the event, with Casey tweeting: "On my way to London with @TheLuluLife having a lovely catch up."
What do you think of Casey and Luisa's outfits? Let us know by commenting below as the best comment across the site each week wins £50!
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