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.]
At last night's Billboard Music Awards, Stefano and Domenico dressed their second favorite tween in a sexy cutout gown from their fall 2011 collection.
Selena paired her revealing number with Giuseppe Zanotti ankle strap bow sandals.
[Image via Nikki Nelson/WENN.]