Before Balenciaga, Paris, October 2016.
One-shoulder top. 
Recreate her look (kind of):
Rosie Assoulin One-shoulder ruffle-trimmed top, A.W.A.K.E. Twisted one shoulder top, Marques Almeida One-shoulder frayed denim top, Rachel Comey Georgia top, Club Monaco Elizabet top, Topshop One Shoulder satin top, ASOS Denim One shoulder top, Tibi One-shoulder top, Rosie Assoulin Iris one-shoulder cotton top, Solace London One-shoulder striped denim top, Off-White One-shoulder printed top, Solace London Freja top, Topshop One Shoulder top, or Viva Aviva Seersucker Trifecta top