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.]
Hmm, is someone looking for a spanking!? LOLz!
The seXXXy singer also got herself some skimpy holiday lingerie, and proceeded to share naughty pics of her wearing it all over Instagram!
She even hash-tagged one pic "#TeamNaughty" (never in denial, this one .. just another reason we love her so much).
In fact, RiRi was looking so fine in her bedroom attire that she couldn’t even contain it to the bedroom; she wore it to a friend’s lingerie party at a nightclub in Barbados!!
And to top it all of, Rih then also donned a Saint Nick coat when she got cold. That's cheery commitment.
Want to see just how naughty this Santa Baby can be?
See the rest of her seksi snaps (below)!
[Image via Instagram.]