Rihanna turned in her bikini’s for a classy, all black outfit while attending a charity event in Barbados Monday (November 4). The “Monster” crooner chatted it up with children involved in the charity Dance 4 Life – an initiative designed to inspire, mobilize and unite children to fight the spread of HIV/AIDS.

The bad gal also has another deal in the works as she has been proclaimed the newest face for MAC’s 2014 Viva Glam Campaign.

“Mama, Ima #VIVAGLAM girl!!!! Super thrilled to be teaming up with @MACcosmetics for charity! #VIVAGLAM more lipstick, more lives impacted!” she tweeted.

All proceeds from the Viva Glam cosmetics will benefit men, women and children who are living with and are affected by HIV and AIDS.

Check out some photos from the charity event after the jump. – Alley Olivier