Britney Spears reportedly fell pregnant and lost a child at the beginning of the year (07), according to a shocking new expose. Former friends of the Toxic singer have gone public with claims Spears discovered she was expecting her third child in January (07), and tried to convince her then-estranged husband Kevin Federline the child was his. A source tells America's the National Enquirer, "Kevin knew Britney was with other men and at the same time having sex with him to try to win him back. He told Britney that he couldn't forgive her." Spears was reportedly stunned when her ex made it clear a reconciliation was out of the question after she reportedly bedded him on her birthday - 2 December - and she took off home to Louisiana. While there, the Enquirer claims Spears lost her child and family members had to intervene when the singer started spiralling out of control. It was then Spears reluctantly checked into the Promises rehab facility in Malibu, California. The father of the child is still a mystery, but TV presenter Mario Lopez, who was linked romantically to Spears, has, like Federline, ruled himself out. That leaves model Isaac Cohen, producer J.R. Rotem and dancer Blake MCGrath, who all reportedly romanced Spears.