"Everyone in the restaurant stared and was obsessed with Lady Gaga," an eyewitness added. "She even took some photos with people."
Vanderpump added on Twitter, "It was kind of funny, but nobody bothered us all night. I think people thought I was having dinner with a lookalike!"
The "Born This Way" singer has never been one to hide her love for all things Bravo. In fact, Gaga asked several Real Housewives of Beverly Hills stars to appear in her music video for "G.U.Y." And yes, Vanderpump was one of the lucky ones who scored an invite.