After Haider Ackermann, Paris, September 2016.
More images of this gorgeous sparkly goodness here. I really do love this look — a way to wear a fancy skirt (sequined and/or shiny, metallic) during the day. Just add casual trainers (and little ankle socks!) and a bomber jacket or t-shirt. 
Recreate her look (kind of):
Sequin/metallic skirt — Gucci pleated sequined tulle midi skirt, TFNC Pleated Midi skirt, Public School Blaise skirt, Topshop Metallic Ruched Split skirt, Stylekeepers Retro Juliette Pleated skirt, A.W.A.K.E. Shiny Starfish asymmetric skirt, Christopher Kane Pleated silk-blend lame skirt, Noir Kei Ninomiya Pleated lame layered skirt, Topshop Boutique Foil leather midi skirt, or Gucci Pleated metallic leather midi skirt