Rihanna in Zac Posen

She had the hottest song of the year with Umbrella, and now Rihanna is sporting the hottest color! In this cobalt blue Zac Posen dress the sultry singer from Barbados is the center of attention on the red carpet. The flared skirt even has a fun umbrella shape reminiscent of Rihanna's runaway hit! Plus, her sexy new haircut is perfect for showing off the sweetheart neckline. In our eyes, Rihanna can do no wrong!