Surprise, surprise: Kim K just posted another NSFW pic

"What's Kim Kardashian been up to lately?" we hear you ask.

Well, as it turns out, she's been working on a "secret project"...and it's got something to do with wearing no clothes.

RELATED: Kim's boobs attempt high-risk escape from strapless gown

RELATED: Kim Kardashian West: 'Mum talked me into doing Playboy'

RELATED: Kim Kardashian promises ‘nude selfies until I die’

The 35-year-old shared a sexy teaser snap to her Instagram account, which features her bare (famous) butt.

"#secretproject coming soon," she captioned the snap.

This isn't the first time the reality star has bared all on social media.

A few months ago, Kim shared a nude selfie to her 72.2 million followers.

The backlash she received - from both fans and fellow celebs - prompted her to post ANOTHER topless snap with actress and model Emily Ratajkowski.

And, of course, we can't forget about the time Kim attempted to #BreakTheInternet with this NSFW magazine shoot.

Just another day in the life of Kimmy K, right?!

*Want more celebrity, movie and music news worth sharing? Follow us on Facebook, Twitter, Tumblr and Instagram.*