Rihanna attended a party tonight at the Cannes Film Festival in honour of her collaboration with Chopard. The superstar designed two Rihanna Loves Chopard collections with Caroline Scheufele, the brand’s co-president and creative director. The first collection is up for pre-order right now while the Cannes dinner marked the launch of the Haute Joaillerie collection. These more glamorous pieces are perfect for red carpet events. Mel Ottenberg styled Rihanna for this red carpet and his assistant provided the details on the look. The black strapless silk gown and tulle shawl are custom Ralph & Russo.MyTheresa or Luisa via Roma for $1,675. Finally, her suede and Swarovski crystal mules are custom Giuseppe Zanotti sandals.