The Real Housewives of Miami star was staying at the Park Hyatt hotel in Chicago when she decided to deliver an X-rated twist on the mannequin challenge.
However, her attempt was a bit easy, considering she was just lying down.
Joanna arched a leg to conceal her privates and raised an arm to cover her boobs, but she still suffered a bit of a nip slip - not serious enough to alert the Instagram censors, though.
The Polish model wrote: "Naughty way of relaxing on this gorgeous clear day at @parkhyattchicago reading @michiganavemag . And doing mannequin challenge my way."
Joanna didn't soundtrack her mannequin challenge though, leaving out Black Beatles by Rae Sremmurd and Gucci Mane, which has been the backing track for most challenges.
In fact, Honey G sparked a live mannequin challenge on X Factor last night while performing the rap track.
Joanna is known for her raunchy twists on social media selfies.
