Guess the Sexy Star Flaunting Her Summer Bod in This Hot Shot

Can you guess which hot celeb put her summer bod on full display in this eye-popping shot?! Here are a few clues to get you started:

She's an Australian fitness model with 17 million Instagram followers. She has a fitness brand called "Tammy Fit" ... and when she's not cranking it out in the gym, she's a doting mother to her three kiddos.