Divas Who Dine! Christina Aguilera & Rihanna Look Unusually Demure

They are known both for their distinctive singing voices as well as their onstage racy ensembles. But Rihanna and Christina Aguilera looked a little more demure as they dined together at upmarket restaurant Giorgio Baldi on Sunday night. The Diamonds singer joined Christina and her fianc� Matthew Rutler at the eatery, in Malibu, California with Christina sporting a distinctive cream hat with black ribbon.