Having been one fifth of Girls Aloud, we're pretty sure Kimberley has tried oodles of expensive beauty products.
And as a resident of Chelsea, we totally assumed Rosie's bathroom cabinet would be brimming with posh lotions and potions.
But both ladies turn to the Nip + Fab Circulation Fix Body Scrub, £9.95, to keep their skin in tip-top condition.
"I started using the Nip + Fab Circulation Fix Body Scrub when I was in the South of France, it's a great pre-holiday beauty prep to polish the skin," revealed Rosie.
And while Rosie primps her pins before her summer vay-cay, Kimberley uses her scrub post-gym, saying: "The Nip + Fab Circulation Fix Body Scrub is perfect to energise your skin after a workout, it really improves circulation.
"And the Nip + Fab Post Workout Fix Body Serum, £9.95, is a clever roll-on gel to cool off aching muscles, also great to use in the heat!"
Well, if it's good enough for Rosie and Kimbers...
What do you think of Rosie and Kimberley's bargain beauty buy? Let us know by commenting below as the best comment across the site each week wins £50!