Britney Spears is facing bankruptcy after spending a staggering $21 million (GBP11 million) in the past two years, according to a British newspaper. The troubled pop princess is currently being treated for a substance abuse problem at California's Promises rehab clinic. The Daily Star alleges Spears is "scared to death" of the financial situation she faces when she leaves the centre, after spending two thirds of her $32 million (GBP16.5 million) fortune. A family friend is quoted by the newspaper, saying, "She has to concentrate on staying sober, but she can't do that if she has to worry about going broke - which is exactly what she thinks will happen."