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.]
Looks like Mel B was getting a head start on Halloween Sunday night.
The Spice Girl was outside London's Mayfair hotel for a screening of her reality show Mel B: It's A Scary World sporting a skin tight black catsuit and leopard boots.
We hope she didn't have to go to the bathroom because that thing would be a pain to get out of!
[Image via XposurePhotos.com.]