This is one sexy fashion face-off!
Jessica Simpson took to Instagram to show off her super toned beach bod in a sexy black Agent Provocateur caged one-piece.
In the pic, the mother-of-two gave the camera a sultry stare while flaunting her enviable curves on a boat.
"Yacht Life #FBF @jacquieaiche @agentprovocateurofficial @kristingram," she captioned the steamy shot.
And if her monokini looks familiar, it's because we've seen it before on Kylie and Kendall Jenner!
The 17-year-old reality star modeled the swimwear earlier this week, paring it with a gold pendant necklace and baby-blue hair extensions for her new line.
Meanwhile, her older sis rocked the designer duds in her March pictorial in Allure magazine which was shot by famed photographer Mario Testino.
So, who do you think wore it better: Jess, Kylie and Kendall? Sound off below!