Christian Siriano, rainbow-colored evening gown, flowing chiffon fabric, delicate spaghetti straps, sweetheart neckline, fitted bodice, full skirt with layered tulle underneath, sparkly sequins and beads, shimmering iridescent colors, floor-sweeping train, 3/4 composition, soft focus background, warm golden lighting, elegant pose, confident smile, bright red lips, wavy hair, glamourous makeup, luxurious atmosphere, high-fashion photography.