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Britney Spears attempted suicide in rehab last week, according to The News of the World.
The paper claims Britney also wrote devil's number, 666, on her shaved head and began screaming "I am the Antichrist!" at frightened clinic staff.
"She was crying, and shouting, 'I am the Antichrist!' a source told the paper.
"The clinic people just didn't know what to do. Then she started screaming, 'I'm a fake! I'm a fake!' It must have been really frightening.
"Later that night she tried to kill herself," the source said. "Paramedics were called, but luckily she was unhurt."
"When she tried to kill herself it was more a cry for help."
The strange actions follow weeks of erratic behaviour from the pop star, who checked into Promises clinic in Malibu, California 10 days ago.
The News of the World report claims Britney has also been speaking at length with ex-husband Kevin Federline, telling him she wants to get back together and have another baby.
"Kevin has been a real tower of strength for her and she has finally decided to give their marriage another shot.
"She thought things were over between her and Kevin after his wild partying and gambling.
"She felt he had deserted her and left her to bring up their two children on her own.
"But Kevin's like a different man now. He's never been so caring before, and is really worried about Britney, a source close to Britney told the paper.
"He's been Britney's rock during her difficult time, and she wants to give him another chance.
"This week she even asked if she could have a night away from the Promises Clinic with Kevin. She's still waiting to hear if they will give her a pass so that they can go out for a romantic meal together.
"Kevin has also taken their two little boys to see their mum in rehab."
- NZHERALD STAFF