Richie 'stopping Madden moving on from Hilton'

Paris Hilton's best pal Nicole Richie is so upset by the socialite's split from Benji Madden, she's preventing him from meeting any potential new girlfriends.

The hotel heiress confirmed her break-up from Good Charlotte rocker Madden on November 21, when she said the couple was "taking a break" after nine months together.