Rihanna swapped her bad girl style for a more demure look as she attended the Zac Posen New York Fashion Week runway show on the arm of the designer himself. The S&M hit maker who is known for her risqué style was the epitome of sophistication as she walked the red carpet in a maroon satin dress that complimented her toned physique. The dress, which of course was a Zac Posen number, hugged the beautiful stars curves and featured a low neckline giving the look a chic but sexy edge.