The cast of “Perez Hilton,” courtesy Landless. Andrew Lloyd Baughman has gone where few have tread before: he’s attempting to give Perez Hilton some depth. And he almost pulls it off, too, despite the middling material he’s got to work with. Baughman stars as the title character in Perez Hilton Saves The Universe! (or at least the greater Los Angeles area), now being staged by Landless Theater Company at DC Arts Center. The musical,…