"100% BUILT IN THE GYM 🍑💕," wrote the mum-of-two, who previously said being accused of having implants is "frustrating".
"Natural booty building doesn’t happen overnight 🙅🏼♀️ It requires years of consistent weight training and lots of good food!
"I have been training HEAVY weights for YEARS. As you can see my butt was pretty much non-existent on the left! Ladies, it IS possible! Don’t let anyone tell you otherwise!" she wrote.
While she maintains her body has changed thanks to consistency in the gym and a balanced diet, we do know Tammy dabbles in FaceTune. In 2019, the Gold Coast native was accused of airbrushing her photos after a fan shared an unedited - and almost unrecognisable photo of the star.
The image — which was taken minutes after the Good American model uploaded her doctored snap to social media— showed off her broader looking shoulders, darker coloured eyes and rounder face. The photo also highlighted the breast implants the 26-year-old had done after giving birth to her second child.
In Tammy's Insta photo, her facial features appeared smoother, she looked more tanned and there were no visible lines around her mouth and chin area.
Interestingly, this wasn't the first time the mum of Wolf, 5, and Saskia, 4, had come under fire for heavily doctoring her posts.
In one post, eagle-eyed followers accused the celeb of changing the shape of her hips and waist after many spotted that the tiles in the background of her poolside picture were wonky and distorted.
"I love the hell outta her but why are the tiles so bent?" wrote one follower of the selfie queen's questionable shot.
"Photoshop Level 3000" and "there’s something not right about the bellybutton miss," another Instagram user wrote.
She later denied accusations she photoshopped the post.