Kim Kardashian Posts Pic of Her Naked Butt, Teases 'Secret Project'

Kim Kardashian is wasting no time getting naked after achieving her post-baby weight loss goal.

On Thursday morning, the mother-of-two shared a photo herself from the back, wearing only her bra and exposing her bare butt. She captioned the photo: "#secretproject. Coming soon."

Kim tagged fashion photographers, Mert Alas and Marcus Piggott, in the post, and Mert also shared a photo that appears to be of the 35-year-old reality star's breasts. "GUESS WHO #secretproject. coming soon," reads the caption.

Kanye West's wife is full of surprises this week. On Wednesday night, Kim -- who rocked a skintight, shimmery silver, turtleneck Audra dress and Yeezus heels -- shocked fans at the Cinepolis Luxury Cinemas at the Promenade in Thousand Oaks, California, when she showed up at a movie theater without warning. "I'm about to walk into this movie theater and surprise the 60 subscribers to my app! They have no idea!" she tweeted ahead of her appearance. Fans were also treated to a screening of Troop Beverly Hills.  

Fans are still waiting to see what Kim will drop on them next, but the last time she shared a nude selfie in March, it caused quite a bit of controversy. Here's a look at how celebrities, including Chloe Grace Moretz and Bette Midler, responded to her naked photo: