Formerly-brunette socialite Kim Kardashian is heating up Twitter with an image of herself in a black bra and matching panties.

The star of E!’s Keeping Up With The Kardashians recently stripped down to her underwear on the set of an ad photoshoot and uploaded a behind-the-scenes image to the popular social networking site.

“A sneak peek at our Quick Trim photo shoot!” read the caption beneath the picture.