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.]
The Project Runway host arrived at the amfAR Gala in a strapless Roberto Cavalli gown and her hair slicked back into a ponytail to show off her Lorraine Schwartz jewelry.
Heidi was still wearing her wedding band on her ring finger, but maybe she just really like the yellow diamond bauble.
[Image via Ivan Nikolov/WENN.]