That's a close one!
We don't know any celebs who shy away from showing off their curves on Instagram, and this latest social media nip slip is no exception.
One A-Lister shared a near-wardrobe malfunction on Sunday alongside one of her friends, but she's actually not at risk of showing any nipple.
[ Photo: Guess The Reality TV Star Showing His Bare Behind! ]
On the other hand, there is clearly areola visible in the shot, so we guess the mystery celeb was feeling a little bit cheeky!