Photographers chased Spears across Los Angeles after her early release from a hospital where she had been held for a mental evaluation.
Six days after being admitted, Spears made a low-key departure from the UCLA Medical Centre, accompanied by private security guards.
She returned to her Beverly Hills home, but when she ventured out later, a crowd of paparazzi caught up with her and surrounded her car.
In a statement, the singer's parents said they believed their daughter's life was at risk, and questioned why she was allowed to leave the hospital.
