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.]
For the mag bash Nicole wore a purple Emilio Pucci one shoulder dress and nude heels.
We're kinda surprised she didn't wear Winter Kate, but this is nice too.
[Image via Getty Images.]