Diamonds are certainly a girl's best friend as far as singer Beyonce is concerned.

The 25-year-old pop superstar has become the face of Emporio Armani's new perfume, 'Diamonds' and stars in the company's new ad campaign.

The songstress has also added her own take on the Marilyn Monroe song 'Diamonds Are A Girl's Best Friend' for the advert.

The new fragrance features notes of lychee and raspberry.

The singer says she has learnt from experience to be prepared when she goes to photo shoots.

She carries three pairs of sunglasses (black, gold and brown) in her bag and not one but two pairs of Christian Louboutin heels, in nude and gold, in case she needs to glam up an outfit at a moment's notice.

A favourite with the paparazzi, who follow her every move with their cameras, she says she's not worried about them taking shots of her from unflattering angles.

And she says she loves fashion and shopping far too much to give it up because of a few photographers.