Hilary Duff is keen to show how grown up she is by starring in a film produced by Hollywood’s most notorious oadame. The `Cheaper by the Dozen’ star is in negotiations with Heidi Fleiss, who was arrested in 1993 for running a high-priced call-girl service catering to LA’s rich and famous. “Hilary wants to shed that good-girl image a little to show people that she is not a little girl any more,” says a friend. Meanwhile, Hilary is convinced her boyfriend, Good Charlotte singer Joel oadden, will never cheat on her. She explains, “Joel’s so loyal. His dad left his family and it has made him become the complete opposite. Plus, he doesn’t drink any more. I think there was a groupie problem when he was drinking. Now he’s clean so I don’t worry about him cheating.” [15 February 2006]