The 34-year-old has jetted to Portugal to stay at a weight loss retreat, where she hopes to transform her body.
Speaking to the Daily Mirror, Gemma said: "I'm going away for five weeks on a weight-loss plan. So afterwards I'll look very, very different.
"I'm a sir 18 now, but I'll be coming out a 14. I got down to a 16, but this will be the smallest I've ever been."
After her time at the retreat is over, TOWIE star Gemma plans to hook up with her former I'm a Celebrity camp mate Kendra Wilkinson and pay a visit to the Playboy Mansion.
She continued: "I'm going celebrate my newfound curves by hitting the Playboy mansion. Then we'll call up the Kardashians."
But Gemma insisted she's got no desire to become a Playboy bunny.
"Hugh Hefner? Old boys ain't really my style," she added. "But Hank [Baskett, Kendra's husband] has got some friends on the LA basketball team."
Gemma recently appeared on Katie Hopkins' new TV show and, despite the social commentator's attacks on her in the past, she claims Katie would do a good job at running the world.
She said: "If Katie Hopkins ruled the world, I think she'd do a good job at it.
"Underneath it all, I think she's a sweet fluffy cat but I don't think people see that side to her."