Joel and Benji Madden landed in Sydney yesterday and immediately got to work. Just hours after touching down, they acted as DJ’s at the launch of the Blackberry Curve. The pair arrived by boat at Simmer On The Bay in Dawes Point and rocked out for an hour and a half. Joel’s partner Nicole Richie and their two kids, Harlow and Sparrow, stayed back in the US. The Good Charlotte boys will be hanging out this week and will appear on Australian Idol Sunday as mentors and guest judges.