She became an overnight social media sensation after sharing incredible photos of her post-baby body, just two months after giving birth in 2014.
And on Thursday, Tammy Hembrow, 24, shared an epic throwback photo of her bare baby bump while she was pregnant with her son Wolf.
The influencer shared a heartwarming tribute on Instagram in honour of Wolf's fourth birthday and one photo showed her heavily pregnant with her firstborn.
'Happy fourth birthday to my sweet little Wolf,' she captioned a series of throwback photos.
'You changed my life in every way & taught me of a love I never knew could exist. I'm in awe of you every single day & am beyond blessed to have you. Forever my sun, my moon, & all my stars.'
Tammy displayed her huge bump in a tiny white bikini while frolicking at the beach.
Motherhood: Tammy shares two children with her ex-fiancée, Reece Hawkins - Wolf (pictured) and a two-year-old daughter, Saskia
Another photo showed Tammy flaunting her gym-honed physique, months after Wolf was born.
The Queenslander rose to stardom five years ago after documenting her post-baby body transformation on social media.
She went on to build a lucrative fitness empire, which includes her workout app Tammy Fit and activewear label Saski Collection.
'Did you have a Brazilian butt lift?' The Queenslander became an overnight sensation five years ago after documenting her post-baby body transformation on social media. However, in October last year, trolls accused the mother-of-two of having a 'fake' backside after she shared a video of herself wearing a G-string to Instagram
Tammy is believed to be worth at least $3million, with reported earnings for Saski reaching over $3.6million in just 12 months, according to a representative.
In October last year, trolls accused the fitness entrepreneur of having a 'fake' backside after she shared a video of herself wearing a G-string on Instagram.
'Did you have a Brazilian butt lift?' one follower asked, which prompted Tammy to reply that she had 'a 100 [per cent] natural booty'.