Bar Refaeli shows off her sexy back in a high neck and floor-length dress in a Roberto Cavalli party at Les Beaux-Arts de Paris, 29 September in Paris, France. Fellow models Karolina Kurkova and Natalia Vodianova also showed their support for Roberto. The 25-year-old model joined celebs including Taylor Swift, Heidi Klum and Rachel Bilson in celebrating Roberto long and successful career.