Madonna is set to enlist the services of the lawyer who handled Paul McCartney’s divorce settlement, the Times of London reports. The pop star, 49, is reportedly exploring a split from director Guy Ritchie, 39. "Steel magnolia” Fiona Shackleton gained notoriety when she secured such a favorable result for McCartney that Heather Mills emptied a water jug over her head in court. (More Paul McCartney stories.)