STAR BRAD PITT WON'T SHOW HIS BUTT !

Star BRAD PITT is refusing to reveal his bare bottom in his latest movie role, insisting producers find a double to replace his rear.The hunky actor - who is filming nude scenes for the Curious Case of Benjamin Button - showed off his naked behind in 2004 blockbuster Troy, but is reportedly refusing the repeat the feat. A source tells British newspaper The Sun, "Casting notices have been put out looking for suitable rears. I think we all have seen Brad naked before....