Pop superstar Britney Spears is to set the record straight about her much-publicised personal problems in a revealing interview with OK! magazine, according to reports. The troubled star, 25, is said to have personally called the American magazine's main switchboard and asked to speak to the publication's editor-in-chief, Sara Ivens, to negotiate a deal for the interview, according to TMZ.com. And the mother-of-two is expected to tell all about her rift with her mother, Lynne, her custody battle and impending divorce from ex Kevin Federline, and her one-month stint in rehab in February (07). The issue of OK! magazine is reportedly due to hit news stands later this month (Jul07).