Nicole Richie wrapped up in a denim jacket but exposed her thin behind with only sheer tights for clothing. Richie has been keeping a low profile with her daughter. Christina Aguilera revealed that she was so impressed with Richie’s mothering skills that she asked her for tips. Richie has been trying to help her boyfriend’s twin brother, Benji Madden. Richie stopped Benji from getting involved in women so soon after his break up with Paris Hilton.