The fashion designer and reality TV star, 33, is living by the TOWIE mantra "no cards before marbs" and working damn hard at No1 Boot Camp in Norfolk.
Before heading to the fitness specialists, Gemma told her Twitter followers: "Off to @no1bootcamp to shake my booty for the bank holiday no partying for moi!"
She has since kept her fans updated on her progress with regular posts, including a fresh-faced selfie - and, girl, does Gemma look good!!!
The TOWIE gang are jetting out to Marbella in the coming weeks to film a special double-bill for the new series, and it looks like Gemma is well on her way to looking her best.
She has been running three miles before a spinning class - and that's even before breakfast!
After a rigorous boxing session, Gemma took to Twitter to show off her latest accomplishment - as well as toning up, she's lost weight!
She wrote: "@no1bootcamp amazing boxing session lost 4lbs in 2 days amazing @RealJamesArgent where are you I can't see you."
James Argent and co-star Lewis Bloor were at the bootcamp the same week as Gemma, but left the day before she arrived.
At the recent Reveal Online Fashion Awards on Tuesday 20 May, the flamboyantly-dressed Gemma told us: "I'm proud of who I am, I embrace what I am and I embrace my curves.
"You ain't gonna be putting me in a plain black dress honey! I've already won an award for British Plus-Size Fashion Designer and I'm up for an award tonight."
Gemma won the Editor's Choice Award at the star-studded event.
Do you think Gemma Collins needs to lose weight? Tell us what you think below!