SWINGING-PARIS

Britt Maren leaving Louis Vuitton show, Paris S/S11 Fashion Week

Si Tanwiboon after Pierre Cardin show

Caroline Brasch Nielsen exiting Stella McCartney show

Young woman outside Jean-Charles de Castelbajac show

Caroline Issa leaving Giambattista Valli show

Uliana Tikhova (Ульяна Тихова) outside Felipe Oliveira Baptista show

Young woman outside Louis Vuitton Show

Vika Gazinskaya (Вика Газинская) before Giambattista Valli show

Shy'm outside Rick Owens show

Esme Wissels after Ingrid Vlasov show

Hanne Gaby Odiele outside Dries Van Noten show

Without plait I presume?
You can follow the links given at the end of the post for more pics of Jenny…

Further shots :
Jenny Barchfield outside S/S11 Pierre Cardin show
Jenny Barchfield outside Fall 2010 Haute Couture Lefranc-Ferrant show
Jenny Barchfield outside F/W 2010 Balenciaga show

The first time I saw Si Tanwiboon, that was at the March 2010 Limi Feu show. She is a Thaï model (her real name is Phitsinee Tanwiboon), born in 1988, who signed with Elite Model Management Paris in 2010. This year she walked Jean Paul Gaultier, Junko Shimada, Limi Feu, Louis Vuitton, Vivienne Westwood and Pierre cardin shows.
Below she was exiting Pierre Cardin show.