LATEST: Britney Spears is hoping to make a cash killing by selling the Malibu, California home she bought two years ago (04) for double what she paid for it. The pop superstar has put the estate on the market for a whopping $13.5 million (GBP7.5 million), according to website Sources tell the news site that Spears will have to hand over 20 per cent of the house sale cash to her estranged husband Kevin Federline as part of the couple's pre-nuptial arrangement. That would still leave her with $10.8 million (GBP6 million) almost $4 million (GBP2.2 million) more than the $6.9 million (GBP3.8 million) she paid for the property.