Gemma had a huge smile on her face as she arrived at the West London location, which was attended by a host of celebrities and stars who have worked with the broadcasting channel.
The boutique owner wore a floral wrap-over top, which she teamed with black trousers and pointed heels.
Gemma was all smiles as she joined stylish Chloe for a photo outside, and once leaving the party, she looked rather merry as she prepared to make her way home.
Although Gemma arrived with Chloe, the pair were joined by more of their TOWIE co-stars inside, including Lydia Bright and James 'Arg' Argent, and Jessica Wright and Bobby Norris.
In the last episode of the ITVBe reality show, Gemma and Bobby were still not on speaking terms following their argument at the pool party.
Bobby accused Gemma of trying to 'throw him under the bus' by claiming he was doing impressions of Lauren Pope behind her back, while Gemma was upset with Bobby for not defending her during her argument with Lauren and Vas J Morgan.
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