Good Charlotte rocker Benji Madden is reportedly following in the footsteps of his twin brother and bandmate JOEL, by romancing an underage girlfriend. Joel caused controversy by dating Hilary Duff when he was 24 and she was just 16. Now 27-year-old Benji is rumoured to be stepping out with 17-year-old CALEIGH PETERS, the daughter of movie producer CHRISTINE PETERS. The pair dined out together in Los Angeles this week (begs14AUG06) and, although Madden introduced her to photographers as a friend, pals insists they have been an item for some time - one dismissing the age gap to, "It's no big deal - she turns 18 next month (SEP06)."