Paris Hilton has conceded she split up rock 'n' roll musician Benji Madden's love affair with Sophie Monk since she was going out with the singer prior to his break up from the Australian fashion model. Madden has defended that his involvement with Monk had ended prior to his dating the socialite, only Hilton has disclosed that's not entirely correct. In a recent interview, the hotel heiress admits she became involved with Madden not long after the delivery of dearest friend Nicole Richie's baby daughter, Harlow, last January. Hilton disclosed that the pair had been together for 8 months. Only Monk's spokesperson gave the declaration that the Monk/Madden break up was on February 12, indicating the rock 'n' roll musician and Hilton were going out prior to the 13-month engagement being terminated. Hilton simply laughed slighty when inquired if she caused part of the split up.