Instagram's Eva Chen, after Louis Vuitton, Paris, October 2015.
There is something I really love about Eva's outfit... I can't quite put my finger on it. I guess her sweater/cardigan and jeans have a sort of relaxed 70's vibe, and then the ladylike Chanel slingbacks are a complete contrast. 
Recreate Eva's look (kind of):
Striped sweater — Rag & Bone Viola pullover, Paul Smith Multicolour sweater, ASOS Sweater in stripe with pleat detail, MSGM Striped sweater, Isabel Marant Etoile Striped sweater, or ASOS Co-Ord sweater in stripe with roll neck
Cropped skinny jeans -Stella McCartney cropped low-rise bootcut jean, Current/Elliott The Cropped straight leg jeans, J Brand Selena cropped boot cut jeans,  Rag & Bone Cropped mid-rise straight leg jeans, MiH Niki cropped mid-rise skinny jeans, or The Great The Nerd Jeans
Slingback pumps — Topshop Java Croc sling-backs, Gucci Arielle slingback, or Office Maddie slingbacks