When Charlize Theron guest-starred on "Arrested Development" for 5 episodes, her character had this real quirky fashion style that everyone overlooked because she was so free-spirited. But then it turns out she wasn't quirky and free-spirited, and was, in fact, retarded.
What do we really know about Lady GaGa? She's not retarded is she? That would explain a lot. Is there some test we can give her? Maybe follow her into an elevator with two puppets, a cow and a duck. Then when you're alone, put them on and sing, "the duck says mooo and the cow says quack." And then just wait.