When it comes to a statement headdress it should be treated in the same way as statement jewelry.  The rest of the look should be simple — avoiding busy patterns or loud colors and skipping earrings and necklaces altogether.  In this high-contrast look, I used a Marni for H&M necklace as a headband and paired it with a simple white tank.

WearingChloe sunglasses, Marni at H&M necklace, Vitamin A bikini , Freeloader tank