Jessie J performed at the Queen's Diamond Jubilee Concert yesterday evening at Buckingham Palace in London. The singer sang her single Domino and a duet with will.i.am. Jessie looked fabulous in a Falguni & Shane Peacock Spring 2012 gown. The gold and royal blue gown with red and silver embellishments featured blue feathers on the skirt for a more dramatic effect. She styled her gown with black open-toe booties by Kat Maconie and gold hooped earrings. Dark eye make-up and a sleek ponytail provided the finishing touches for Jessie's look.