I need to go to a black tie event

Just so I have a reason for this....It's a prom dress but hey....maybe this one...Is this duochrome? Seriously go lookIt is right? I love this one too...An Evening dress for a Mermaid!I'll move to the UK if I can get dresses for these pricesWhy don't I have fancy places to wear gorgeous dresses? Oh I could wear them to PTA or Ballet class with my daughter or maybe just around the house. lol