A bum deal: Mariah Carey in undie-lievable knicker flash as photographer gets cheeky

NOTE to Mariah Carey – don't let a photographer follow you upstairs.

KNICKERSHOCKER GLORY: White pants over black tights?

Why, you ask? Because it turns out a pic taken from three steps below can be rather, ahem, invasive when you're wearing a minidress.

The 46-year-old came unstuck on the Swedish leg of her Sweet Sweet Fantasy world tour when she was snapped hugging a male friend in a shimmering silk ensemble.

Unfortunately her bizarre combo of white knickers over black tights was captured forever as she bent over to regain balance, resulting in a first class peach breach.

"Hey Sweden glad to be back to see u" the legendary belter captioned the post to her 3.4m Instagram followers.

Turns out many of them didn't appreciate the gesture.

"I have looked up to you for over 20 years and these pictures are just not becoming of you – I hope that you can keep it classy," one user complained.

PEACH BREACH: Those fishnets never stood a chance

"Nice body but what kind of artist, no less Mariah, would post a pic like this?" another asked.

"This is a messy moment, come on girl," a third chimed in.

It's not the first time Mariah has found herself the (bubble) butt of the joke.

CLEAVAGE QUEEN: Mariah's assets are as impressive as her vocals

While performing in London, the blonde suffered an unfortunate wardrobe malfunction when herfishnets burst open around her rear in the middle of a dance break.

Some bootys just can't be tamed.