Paris Jackson still hasn't properly mourned the death of her father.

The 15-year-old aspiring actress is in hospital after an alleged suicide attempt, and sources tell website TMZ one of the reasons behind her cry for help is she has never properly mourned the passing of her superstar father, Michael, who died from acute Propofol intoxication in 2009.

Paris is currently receiving psychological help at UCLA Medical Center, thought to be because she has developed an obsession with comments people leave on social media sites about Michael, with negative comments ''really getting to her.''

One source says Paris is a ''rebel'' who was almost expelled from school after punching a student who ''talked smack about her father.''

Shortly before her ordeal Paris had become close to her birth mother Debbie Rowe and when she gets out of care it is thought they will go away together for between six and eight weeks to get Paris out of Los Angeles.

Meanwhile, Paris' elder brother, Prince, 16, has been trying to function as normally as possible while his sister is in hospital. He attended the premiere of the sixth season of TV series 'True Blood' with his girlfriend Remi Alfalah this week as well as heading to UCLA to visit his sister.

The siblings - who also have a younger brother, Blanket, 11 - are currently under the guardianship of the grandmother, Katherine Jackson.