Paris Fashion Week in black and white

Model Cara Delevingne poses backstage before the H&M Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 27, 2013, in Paris.

Models backstage before the Rochas Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 27, 2013, in Paris.

Models walk the runway during the Rochas Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 27, 2013, in Paris.

Models backstage before the Guy Laroche Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 27, 2013, in Paris.

A model backstage before the Guy Laroche Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 27, 2013, in Paris.

Models backstage before the Guy Laroche Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 27, 2013, in Paris.

A general view of The Eiffel Tower during Paris Fashion Week on Feb. 27, 2013, in Paris.

A model backstage before the Rochas Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 27, 2013, in Paris.

A Silhouette of a model backstage before the Guy Laroche Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 27, 2013, in Paris.

Models backstage before the Guy Laroche Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 27, 2013, in Paris.

A model backstage before the Guy Laroche Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 27, 2013, in Paris.

A model walks the runway during the Guy Laroche Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 27, 2013, in Paris.

Model Cara Delevingne backstage before the H&M Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 27, 2013, in Paris.

A general view backstage before the Guy Laroche Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 27, 2013, in Paris.

A model walks the runway during rehearsals for the Rochas Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 27, 2013, in Paris.

A model backstage before the Barbara Bui Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 28, 2013, in Paris.

Models backstage before the Barbara Bui Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 28, 2013, in Paris.

A model backstage before the Barbara Bui Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 28, 2013, in Paris.

Models backstage before the Christian Wijnants Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 28, 2013, in Paris.

A model backstage before the Barbara Bui Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 28, 2013, in Paris.

A model walks the runway during the Christian Wijnants Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 28, 2013, in Paris.

A model walks the runway during the Barbara Bui Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 28, 2013, in Paris.

Models backstage before the Christian Wijnants Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 28, 2013, in Paris.

A model backstage before the Barbara Bui Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 28, 2013, in Paris.

A model walks the runway during the Barbara Bui Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 28, 2013, in Paris.

A model backstage before the Barbara Bui Fall/Winter 2013 Ready-to-Wear show as part of Paris Fashion Week on Feb. 28, 2013, in Paris.

CBS News 24/7