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.]
The crooner went for a classic look with a hint of geek-chic in Dolce & Gabbana and thick-rimmed glasses.
To complete his look, Mr. Mars added some Jersey Shore flair by styling his fluffy coif a la DJ Pauly D, but less bullet proof.
[Image via FayesVision/Apega/WENN.]