Mary-Kate and Ashley Olsen linked up last night to celebrate the opening of a Superga store on NYC's Crosby Street. Along with Steve Madden, the Olsens are seeking to popularize the designs in the US. Mary-Kate and Ashley are creative directors of Superga, to which Madden owns the North American distribution rights. Both Mary-Kate and Ashley accessorized with Supergas last night. The girls were in a festive mood for multiple reasons. They're up for a womenswear designer of the year award at Monday's CFDA Awards thanks to their work for The Row. Also, Mary-Kate's apparently got a new love in her life. Twenty-five-year-old Mary-Kate Olsen is dating Olivier Sarkozy, the 42-year-old half-brother of former French president Nicolas Sarkozy. The new couple apparently spent Memorial Day weekend together in the Hamptons.