The reality TV star, 24, was excited to be asked to appear at the launch of the store on Saturday (8 November) - and made sure she wore an eye-popping outfit for the occasion.
We love Billie's bright red jumpsuit which showed off her small waist and kept her natural 32G boobs in check - just!
The gorgeous outfit is one of House Of CB's own, named Perla, a stretch crepe strapless number with tapered legs.
After cutting the ribbon to officially declare the shop open, Billie then met fans who were all thrilled to meet their TOWIE idol.
Billie, who also showed off her new more natural hair colour, later took to Twitter to thank everyone for attending the opening of the shop at Leeds Trinity.
The new mum wrote: "Thank you to everyone who came to the opening of @HouseOfCB Leeds today ... Lovely to meet you all."
However, after a successful day working, Billie's fortunes turned when her car broke down on the way home to Essex!
An unhappy Billie tweeted: "Broken down on the M1."
Friend and fellow TOWIE star Georgia Kousoulou quickly replied: "Erm @Gregshepherd_ go help your baby mumma!!! & you @tommy_mallet make yourself useful."
We hope you eventually got home safely, Billie!
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