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 Beverly Hills event the multi-talented lady slipped into a spiked pencil skirt and sequin halter top from La Maison de Fashion.
This is a perfect look for someone as sassy as Kat. It has the right amount of edge and class for a charity event.
[Image via Getty Images.]