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Known more colloquially as the vase-face optical illusion, Rubin's vase can be seen as the black profiles of two faces looking at each other or as a white vase, but not both at the same time

And if #TheDress isn't scary enough for your liking, check out the best celebrity costumes ever for some Halloween inspiration

I defy anyone not to channel some of her (terrifying) business acumen in this form-fitting pencil dress

Zara Two-Toned Black and White Satin Dress $50 $60 Find Similar Listings Account is under Review Still Selling This

French designer Yves Saint Laurent with model Claudia Schiffer at his S/S 97 Haute Couture show