Anytime Kim Kardashian wants to sell something, she just removes her clothes to get the job done. Sex sells, doesn't it? She's at it again, this time, showing off her butt on Instagram in an artful black-and-white print.

Kim captioned the photo "#secretproject ✨coming soon," and tagged fashion photography duo Mert Alas and Marcus Piggott.

No one knows what the secret project is about just yet, but it could be for another photo series of photography book. Mert and Marcus' official Instagram posted these knockers that look oddly familiar. Kim K's?

What secret project is coming our way, we wonder..