A model presents a creation by U.S. designer Marc Jacobs as part of his Fall/Winter 2012-2013  women's ready-to-wear fashion show for French fashion house Louis Vuitton during Paris Fashion Week March 7, 2012.[Photo/Agencies]

A train carrying models enters the venue before Louis Vuitton's Fall/Winter 2012-2013 women's ready-to-wear fashion show by U.S. designer Marc Jacobs during Paris Fashion Week March 7, 2012.[Photo/Agencies]