Britney Spears has broken her silence on a controversial documentary charting the highs and lows of her career and discussing her conservatorship.The 39 year old was the subject of a one-off programme named Framing Britney Spears, which aired in both the UK and US last month. Her struggles with mental health were featured prominently in the documentary, as well as the depiction of her in the press and the conservatorship which oversees her finances and personal affairs.