R&B beauty Rihanna is set to strip off for a sizzling new advertising campaign after signing on as a spokes model for Emporio Armani's underwear and jeans collection.

The Umbrella hit-maker will follow in the footsteps of Transformers beauty Megan Fox, who set pulses racing in the 2010/11 advertising campaigns.

Rihanna will grace billboards worldwide for Emporio Armani Underwear and Armani Jeans from September.

The singer is in good company as an Armani model - British soccer star David Beckham and his wife Victoria previously fronted ads for the underwear line, as did Portuguese sports hunk Cristiano Ronaldo.