Pop star Jessica Simpson is heading back to school - and she wants to study religion.

The 28-year-old Texan left high school aged 16 to tour the Christian music circuit before she became a pop singer in the 1990s.

Simpson later earned her diploma by taking the General Educational Development (Ged), and admits she's been inspired to head back to class - by TV documentaries.

She tells America's Marie Claire magazine, "I've been contemplating taking a college course in religion. I love religion. I remember whenever the book The Da Vinci Code came out, the Discovery Channel did this three-night piece on it that I TiVoed (recorded) and then watched eight times."