Actress Anna Valle attends the Roberto Cavalli Autumn/Winter 2012/2013 fashion show as part of Milan Womenswear Fashion Week on February 27, 2012 in Milan, Italy. (Photo by Vittorio Zunino Celotto/Getty Images)

A model showcases designs on the catwalk during Eternal Color Xie Ping Collection A/W 2012-2013 of China Fashion Week at Beijing Hotel on March 27, 2012 in Beijing, China. (Photo by Feng Li/Getty Images)

A women wearing a mask to protect from extreme smog visits the Tiananmen Gate in Beijing December 8, 2015 as China's capital issues its first ever "red alert" for pollution. (Photo by Damir Sagolj/Reuters)

A woman wearing a four-leaf clover-like hairpin takes a selfie nearby Nanluoguxiang street in Beijing, China, September 16, 2015. Wearing antenna styled hairpins in the shape of various flowers and plants at scenic spots has become a new trend in Beijing. (Photo by Kim Kyung-Hoon/Reuters)

A model walks the runway during the Versace show as part of Paris Fashion Week Haute Couture Spring/Summer 2015 on January 25, 2015 in Paris, France. (Photo by Pascal Le Segretain/Getty Images)

A model presents a creation by French designer Alexandre Vauthier as part of his Haute Couture Fall/Winter 2016/2017 collection in Paris, France, July 5, 2016. (Photo by Gonzalo Fuentes/Reuters)

A model wears a creation by Peruvian designer Jessica Butrich during Lima Fashion Week, LIF Week Summer 15-16 in Lima October 28, 2015. (Photo by Mariana Bazo/Reuters)

Fashion fans pose outside the main catwalk venue during London Fashion Week Spring/Summer 2017 in London, Britain September 20, 2016. (Photo by Neil Hall/Reuters)