"Twilight" star Robert Pattinson has gone into hiding, staying at the vacation home of his "Water for Elephants" co-star Reese Witherspoon. An insider told the publication that Pattinson is "a total mess. He's questioning everything" while another source said the British star "doesn't know what to do." Pattinson, 26, has been out of sight and not made any comments since his girlfriend of four years Kristen Stewart issued a public apology for having an affair with marred film director Rupert Sanders.