Article continues below advertisementBritney Spears is plotting a dramatic retreat from the United States, with sources telling OK! the pop star is laying plans to rebuild her life in the English countryside after quietly reconnecting with music mogul Simon Cowell.After a turbulent year marked by intense public scrutiny, Spears, 44, is understood to be seeking a clean break from Los Angeles and the family dynamics she associates with her controversial conservatorship. Insiders tell us she has grown increasingly serious about relocating to the U.K.