The reality TV star wore a fabulous figure-hugging orange outfit - one of her own designs - as she celebrated the launch of her self-named boutique.
The shop promises to provide stunning plus size clothes for curvy girls between size 16 to 32.
But skinnier friends were also welcome, as former TOWIE co-star Amy Childs visited the Essex shop to show her support.
She later tweeted: "Sooo proud of my friend @missgemcollins the shop is beautiful #proudfriend xxx"
Other family and friends also sent their best wishes via Twitter, including mum Joan who wrote: "@missgemcollins it's going to be a grand day I am very proud of you go girl you were born so lucky to have a wonderful family that lovesyoux."
The Only Way Is Essex co-star and friend Sam Faiers wrote "so excited for u to open !!! Xxx", while Jessica Wright added "So proud of @missgemcollins and her brand new shop everyone get down there tomorrow for her opening! 5 ropers yard Brentwood x x go girl."
Do you like Gemma's fruity orange dress? Tell us below!