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.]
She chose a black tight-fitting All Saints dress that featured two long zippers on each side.
Not only did the short dress help to show off her toned legs, but so did her cage Herve Leger fringe heels.
The only real accessories she chose to show off were her long blonde locks, and of course, her gorgeous white sparkling smile.
Brit may only be one of the X Factor judges, but she's a fashion finalist in our hearts.
[Image via FayesVision/WENN.]