Simply beautiful, this periwinkle long lace formal dress balances chic style and affordability. The tight formal dress, under $200, is an upscale style from the sheer bodice to the floor. With a sheer inset at the plunging v-neckline, and corset stays that wrap around to the criss-cross deep v-back, this long lace periwinkle gown has a sexy vibe for prom, fancy wedding receptions, and other formal events. The long skirt is fully lined with a floral-lace overlay that opens in a side slit…