Kimora Lee Simmons and her hip-hop hubby, Def Jam mogul Russell Simmons, split up two years ago, and now Kimora is finally ready to make it official. The over-the-top Life in the Fab Lane reality star and Baby Phat style maven seeks sole custody of the couple's two girls, Ming and Aoki, with visitation rights for her ex-husband. The pair cited "irreconcilable differences" as the reason. As for why it took two years to file for divorce, they didn't say. But the fact that Kimora is currently dating Blood Diamond star Djimon Hounsou, and Russell's been seen around town with model Porschia Coleman, could have helped the process along.