The former Hollyoaks cast member has been wasting away in the I'm A Celeb jungle due to the campmates' lack of food.
He and his co-stars, including Coronation Street cast member Jennie McAlpine and Made in Chelsea babe Georgia Toffolo, have had to survive on rice and beans most days.
Jamie, 42, regularly shows off his muscled body on Instagram and he's been trying to maintain his sculpted physique with regular fitness classes in the jungle.
But it seems there's one part of his body he doesn't have to worry about vanishing – his bottom.
During last night's episode, Iain Lee, 44, and Amir Khan, 30, had to do the Dingo Dollar Challenge.
ITV/REX/SHUTTERSTOCKSHOCKER: Jamie Lomas joked he'd had some cosmetic surgery
ITV/REX/SHUTTERSTOCKCONTROVERSIAL: Amir Khan and Iain Lee ate Kiosk Keith's treat themselves
They got the dosh and the question their campmates had to answer correctly was, how many people who have had cosmetic surgery regret it?
The answer options were 65% or 75% and the celebrities back at camp tried to figure out which was more likely.
Comedian Shappi Khorsandi, 44, said she knew three people who had had surgery and regretted it.
Rebekah Vardy, 35, added: "I know people who have had cosmetic surgery. I've had cosmetic surgery before and I didn't regret it and I don't think any of my friends did."
INSTAGRAM@JAMIELOMAS21GYM LOVER: Jamie Lomas regularly shares gym updates on his Instagram
“When I got my butt implants, I loved it”Jamie Lomas
And it was then that Jamie dropped his own surgery bombshell, saying: "When I got my butt implants, I loved it."
His comment went completely over the heads of his co-stars who didn't even ask about it or give a giggle in response.
We're pretty sure Jamie was only joking and any increase in the size of his derriere is probably down to hard graft in the gym.
Last night's Dingo Dollar Challenge was shocking for another reason too and it was nothing to do with Jamie.
ITV/REX/SHUTTERSTOCKMAN CANDY: Jamie Lomas has been showing off his gym-honed body in the jungle
The campmates correctly answered the question and Amir and Iain won strawberries and cream from Kiosk Keith.
But instead of returning to camp with the treats, the dastardly duo scoffed them on their way back.
At first they lied and said they'd answered the question wrong, but soon confessed, much to the annoyance of their hungry co-stars.
I'm A Celebrity... Get Me Out Of Here! continues tonight at 9pm on ITV.