Well, this is interesting. After showing her tummy and major side-boob in a cut-out white dress at a party Thursday, Ireland Baldwin went a step further and bared her nearly-naked bottom in a shocking Instagram photo on Friday.

The 20-year-old daughter of stars Alec Baldwin and Kim Basinger posted the pic of her trying to zip up a skin-tight dress over her ample derriere. She made no bones about letting it all hang out, with just a thin, nude-colored G-string "covering" her butt.

"Watch as Houdini Baldwin attempts to defy science and slip into a size 000," she captioned the photo.

ireland baldwin butt
Ireland Baldwin/Instagram

Ireland Baldwin's bare bottom as she tries to zip up a tight dress.

M'kay.

Ireland is no stranger to taking and posting sexy pictures of herself. We've seen her frolicking in pasties and bathing suit bottoms on the beach, flaunting side-boob, the works. On Thursday, she partied in the revealing, white dress at the launch of the Fallout 4 game.

ireland baldwin

Ireland Baldwin

RELATED: Alec Baldwin's Model Daughter Ireland Goes Topless in New Fashion Shoot

The model is said to be in a much better place recently after struggling with bouts of anxiety and even checking herself into rehab. As a little girl, she was caught between her famous parents during their bitter divorce and custody battle.