RiRi is one of four celebrities who are taking part in the Tap Project - offering fans the chance to win a collection of bottled TAP water.
Other stars joining the 23-year-old are Disney queen Selena Gomez, country superstar Taylor Swift and Entourage actor Adrian Grenier.
The project encourages fans to sign onto the UNICEF Tap website and donate $5 towards the cause.
Once fans donate they will be entered into a competition to win 'The Ultimate Deluxe Platinum Celebrity Tap Pack.
The Pack features four limited edition bottles of water from Gomez, Rihanna, Swift and Grenier.
Each celebrity has their face etched on their own bottle with the word Tap printed on it.
The website markets the water with the slogan, 'Rihanna, now collaborating with her kitchen sink.'
They say every dollar from fans entry helps UNICEF provide clean, safe water to a child in need to 40 days.
Fans wanting to donate and have a chance to win the celebrity water can log on to www.uniceftapproject.org
Posted by TOTT Staff at 3/19/2011 02:59:00 PM