Well, the dress has been found ... to be a fake!
The thief who took the gown says he took the dress from Lupita's room at The London after finding the door ajar.
[Image via WENN.]
And now we know why!
The ginormous ad in NYC was part of a Project Runway challenge, which aired last night. Designer Gretchen Jones was the lucky contestant who had the winning design, a navy jumpsuit.
Because she won, Gretchen's design was worn by Coco for the new Marie Claire campaign.