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.]
Not surprisingly, the singer slash designer wore a white jumpsuit from the L.A.M.B. S/S 2012 collection as well as L.A.M.B. platform sandals.
To complete her look, Gwen styled her hair into one of her curly knots and signature bright red lips.
[Image via FayesVision/WENN.]