Rihanna headlined at Hackney Weekend Festival last night. Rih was styled by Mel Ottenberg for her set. She wore black sunglasses with gold detail by Mercura NYC, who are known for their out-of-the-box designs. Her t-shirt is Katie Eary‘s Screaming Cheetahs tee from the Spring/Summer 2012 collection. She also wore the highly coveted Nike x...