Britney Spears had a wild night out at a restaurant in Thousand Oaks, where she was acting irrationally, and paparazzi followed her car as it weaved in and out of traffic. An eyewitness tells ET ‘She appeared unsteady, accidentally knocking over glasses and dropping items on the floor.’This comes after the bombshell claims about Britney as a mother in Kevin Federline’s new memoir, ‘You Thought You Knew’ out now.