Strike a sexy pose!

Rihanna nearly bares all in her new Giorgio Armani Underwear ad campaign!

PHOTOS: More celebs who love wearing Armani

In the just-released black-and-white photos, the 23-year-old songstress poses in a lace bra, leather jacket and skin-tight jeans while draping her incredibly toned body over the hood of an antique car.

PHOTOS: Stars baring skin in lingerie-inspired clothes

One particular image is so steamy that it's sure to stop traffic and turn heads: the "S&M" singer is sprawled out in the back seat of the car while gazing at onlookers in just a bra and matching panties.

PHOTOS: Stars who moonlight as fashion designers

The Barbados beauty is the latest celeb spokesmodel for Giorgio Armani Jeans and Underwear -- she follows a laundry list of stars including David and Victoria Beckham and Megan Fox, who've all posed in the Italian label's sexy campaigns.

Get more Us! Follow us on Twitter, Friend us on Facebook, Subscribe to Us Weekly