Gemma, 30, proudly showed off the results of her gruelling workouts on Instagram, but some users claimed she’d had a bit of help from Photoshop.
But the actress, who plays Carly Hope in ITV’s Emmerdale, blasted the comments.
Sharing a behind the scenes shot from a recent photoshoot, Gemma fumed: “This pic is for those people who messaged me to say I’m ‘airbrushed’.
“I worked DAMN HARD to get in shape for this shoot & it annoys the hell out of me when people think I didn’t. I wish (like some lucky beggars!) I looked like this without as much effort but alas, i don’t.
“It took consistency, patience, will power and hard graft both on the gym floor and at home to control what I ate and what I avoided. I’m not an athlete, I am a normal girl and I love my food.”
Gemma added: “If I can do it so can you. Don’t give up on yourself!”
Opening up in a recent interview with OK! Magazine, Gemma, who is in a relationship with personal trainer Olly Foster, admitted she’s feeling broody.
She said: “I always said I’d have a baby at 32 – my mum had me at 32 – so hopefully we’ll do that in a few years if God allows it.”