Fashion Week continues to heat up with a blend of bondage gear and underwater creations. From the gold metallic S&M gear at Hervé Léger to the delicate sea creations of Marchesa, Spring 2012 will be a time of blossoming fantasy. Another hot, unexpected trend emerged yesterday: Sisters proved to be the hottest accessory of the day as Beyonce and Solange Knowles, and Elle and Dakota Fanning took to the runway shows together. It's official, sisterly love is so hot right now.