Shala Monroque, before Alexander Wang, NYC, September 2014.
The tiara... not just for princesses (or weddings!). 
Recreate Shala's look (kind of):
Miu Miu Ruffle-trimmed printed cotton blouse, Rachel Comey Willow ruffle-trimmed blouse, Sonia Rykiel Ruffled crepe de chine blouse, ASOS Ruffle blouse with tie detail, Topshop Petite Ruffle blouse, or Miu Miu Ruffled silk crepe de chine blouse
Miu Miu Crystal and pearl tiara, Erickson Beamon Ringtone gold-plated crystal headpiece, ASOS Occasion Tiara headband, Dolce & Gabbana Palladium-tone crystal headpiece, Topshop Sequin and Rhinestone headband, or Jennifer Behr Avery crystal headband
Miu Miu Acetate and gold-tone mirrored sunglasses