Before Stella McCartney, Paris, October 2016. 
Recreate her look (kind of):
Relaxed wide leg trackpants — Norma Kamali Side Stripe Elephant sweatpants, M.Patmos Compton sweatpants, Keji Metallic cotton-blend wide leg pants, Weekend Max Mara Wide-leg jersey trousers, Masscob Roy straight-leg velvet trousers, Nohant Maxi Jersey Wide pants, ASOS Slouch Marl wide leg trousers, Chloe Jersey palazzo pants, or Derek Lam Drawstring wide leg pants