LiLo's secret diaries during rehab and jail unveiled

Troubled actress Lindsay Lohan reportedly kept a secret diary during her rehab stint where she wrote about every single day.

Sources at the Cliffside Malibu treatment center revealed that the 27-year old American actress kept a confidential notebook and pen with her everywhere she went in the rehab clinic and wrote in it even during group therapy sessions, which angered other patients, Radar Online reported.

According to the Enquirer, the 'Mean Girls' actress has been keeping secret diaries since she was 8-years old.

It is through her diary entries that her relationship with Heath Ledger, who she described as the 'love of my life', and letters she sent to lesbian lover DJ Samantha Ronson from Promises rehab center in Malibu, were exposed.

'The Canyons' actress even kept a detailed diary of her time behind bars while serving time in 2010 at the Century Regional Detention Facility in Lynwood, California.

Sources at the rehab said that her diaries are the "treasure trove of her private thoughts" where she apparently writes everything.