The TOWIE star, 34, wants to shed the weight and unveil her "very different" look after a five week weight loss plan.
Speaking to The Mirror, Gemma says she plans to reveal her new figure at the Playboy mansion - as a Bunny Girl!
The newspaper reports that plus-size designer Gemma has gone on a month-long juice diet in a bid to drop two dress sizes and get to her lowest weight yet.
She has just returned from Portugal where she stayed at the £5,000-per-week retreat run by "juice master" Jason Vale.
After her detox, Gemma will then join I'm A Celebrity co-star and friend Kendra Wilkinson at the Playboy Mansion.
Gemma says: "I'm going away for five weeks on a weight-loss plan. So afterwards I'll look very, very different.
"I'm a size 18 now, but I'll be coming out a 14. I got down to a 16 before, but this will be the smallest I've ever been.
"And then I'm flying out to America to hang out with Kendra in the first week in September. I'm going incognito - not filming."
Gemma also reveals she wants to "celebrate her newfound curves" in the Playboy Mansion, and then meet the Kardashians.
She lost two stone and 19 inches from her waist earlier this year with the help of hypnotherapy, but soon started gaining weight again.
Perhaps Gemma also has her sights set on showing off her bikini body in the Australian jungle...?
The reality TV star and boutique owner is said to be in "advanced talks" to reappear on I'm A Celebrity, after only lasting three days last year.
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