R&B star Rihanna has stripped down to her underwear in a series of racy ads for Armani.

Sporting a short, blonde wig, the 23-year-old lounges in the back seat of a vintage car wearing just a cream-coloured bra and knickers. As you do.

Rihanna poses for an Armani shoot

Other risque shots see the diva slipping into saucy lingerie and sprawling over the bonnet of a car.

Rihanna looks no

Rihanna to sue over $7 million leaks at LA home

Rihanna S&M censorship justified say Radio 1 fans

Rihanna was named as the new face of Armani in July. Other sexy celebrities that have pranced around in their underwear for the luxury fashion label include David and Victoria Beckham and Megan Fox.

Rihanna strips for sexy Armani ad

Photographed by Steven Klein – who has also snapped the likes of Justin Timberlake – in New York City, the campaign's black-and-white film noir feel gives it a suitably sexy edge.

Rihanna sprwals on the boot of a car for an Armani ad

The shots could help cement Rihanna's position as showbiz's least-dressed celebrity.

It has to be noted that Rihanna looks considerably skinnier than usual in her new Armani ads. Do you think someone's been on an airbrushing spree?