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The singer allegedly says she misses Ghalib and wants to be a teacher in the texts, which have been offered for sale via his agency FinalPixx.
According to reports, Ghalib has also agreed to reveal intimate details of the couple's relationship on a US TV show.
A source said: "He's getting paid a lot. And his interview will be stretched out over several days."
Spears attended a meeting over custody of her children yesterday after failing to make it to her last court hearing.
Authorities in LA have denied claims that she filed a restraining order against Ghalib.
