Rihanna is following in Megan Fox's sexy footsteps -- and is taking it off for Armani Underwear.
The sexy singer is the latest to pose for the brand, showing off her incredible body in a series of just-released photos.
Wearing lingerie, jeans and a blonde wig, RiRi looks amazing ... shocker, right?
Megan Fox and Victoria Beckham previously modeled for the designer.
