Country legend Johnny Cash's daughter ROSANNE is to undergo brain surgery in New York to treat a "rare but benign condition". The Grammy-winning singer/songwriter has not revealed exactly what illness she is suffering from, but will have the operation at the New York Presbyterian Hospital as soon as possible. As a result of the condition, she has cancelled the remaining four live U.S. dates scheduled for later this month (Nov07), which were to support the recent release of her Black Cadillac album. But the 52-year-old star plans to be back at work early next year (08). A posting on her official website says, "Rosanne is expected to make a full recovery and will return to the studio to complete the recording of her debut for Manhattan Records. "Ms Cash will also resume her live performance schedule in the spring and will complete a new book to be published by Viking in early 2009." The critically acclaimed singer is the daughter of Johnny Cash and his first wife Vivian, and the eldest of the late icon's five children.