Rihanna stars in the Armani Spring/Summer 2012 campaign rolling around in a bed wearing only undies.

Rihanna wakes to find a mysterious message on the bathroom mirror triggering her to pull on her Armani jeans and shirt to run off and meet who knows who.

Last year, the ad she posed by Armani was voted the sexiest ad of 2011. You'll find a slight rendition of the same shots from last year except featuring her with dark locks opposed to a blonde style.

The photos were taken by Steven Klein who was the photographer for the Autumn/Winter Campaign.

Below are some of the images and of course dont miss out on the steamy commercial at https://www.youtube.com/watch?feature=player_embedded&v=49lEbCb_x-I