It seems that nothing is out-of-bounds when it comes to Lynne Spears' tell-all about daughter Britney's troubled past.

The latest revelations to be leaked from Lynne Spears: Through the Storm include claims that the young pop-star was drinking at 13 and losing her virginity aged 14.

The book also describes how the former Mouseketeer was already dabbling in drugs when recording Baby On More Time at aged 15.

Lynne believes that it was her daughter's teenage drug experimentation that has led to her current problems.