Joanna Hillman, Style Director Harper's Bazaar US, Tuileries, Paris, October 2013.
So many great ways to style a sweatshirt this season whether it be cropped, printed, embellished or plain like Joanna's sweatshirt. 
Recreate Joanna's look (kind of):
Grey sweatshirt: Zoe Karssen jersey sweatshirt, BLK DNM loose sweatshirt 6, LPD New York Team Philo printed sweatshirt, Topshop Boutique ribbed sweatshirt, Etoile Isabel Marant Hammer printed sweatshirt, ASOS Boyfriend sweatshirt, No. 21 Sweatshirt with Palm tree, Sophie Hulme embellished sweatshirt or Derek Lam cropped pullover
Mini skirt: Three Dots Trumpet miniskirt, Rebecca Minkoff Andre skirt, Victoria Beckham Fluted skirt, or ASOS trumpet hem skirt
Open toe heels: ASOS Total leather shoe boots, 3.1 Phillip Lim Vincent Open toe mules, Steven Clara open toe booties, or Nanette Lepore Manhunter booties