White Gown Prom Wedding Mingda's Dress NWT like Marilyn Monroe Halter Sequins

Size 14 NWT floor length gorgeous white gown. Halter top with sequins beads around neck and high waist. Peep hole below bust. 36C would fill the cups of this dress. Lined with a satin like smooth fabric. Side zipper extends down to hip. Two plastic snaps fasten the neck strap. What event would you wear this fabulous dress to? Please see pictures for measurements.