Britney speaks about breakdown
Britney Spears has said she can't explain her erratic behaviour over the past two years.
The wayward star admits she made many mistakes - including shaving her head and being hospitalised after a row with police - in an MTV special, Britney: For The Record.
The 26-year-old said: "I sit there and I look back and I'm like, 'I'm a smart person. What the hell was I thinking?'"