LIFE STYLE EXTRA (UK) - Britney Spears reportedly rushed her baby son to hospital - because he was constipated. The pop babe is said to have panicked when four-month-old Sean Preston wouldn't stop wailing, and was terrified he was ill. She called a bodyguard who drove her straight to Los Angeles' Malibu Urgent Care Centre. But nurses at the clinic told the singer there was nothing wrong with the tot - he was just struggling to fill his nappy. One nurse is quoted in Britain's Daily Star newspaper as saying: "It seems he was just straining to fill his diaper....