Photo -Instagram

Rihanna celebrated her birthday today (20Feb13) by signing a massive new deal with MAC Cosmetics.

The singer's first product, a lipstick called RiRi Woo, will be released to coincide with the start of her Diamonds Tour in Brooklyn, New York City in May (13). In a post on her Twitter page, Rihanna said, "That's right baby, I'm a Mac gal (sic) now! Get into it, package designed and products created from scratch by yours truly! Thanks to the epic team at Mac for giving me the opportunity to play and share my favourite s**t with my fans and yours."

Rihanna’s products from MAC will be released throughout 2013.