Rihanna kept it daring and unforgettable in a shimmering backless dress, glowing with confidence and cool girl allure. Rihanna keeps it flawless in a gorgeous YSL slip dress, showing exactly how street style should be done. Rihanna Wears Sheer Black Maternity Dress at Dior's Fashion Show White Rihanna Tight Backless Round Neck Dress Knot Prom Celebrity Form Hoprom Speaking of Rihanna's second look, she wore a black dress for the event, in which she looked absolutely stunning. During the event, she posed for the paps in stunning poses., To complete her look,