News of the World reports staff at Promises have struggled to cope with Britney Spears as the singer tries to rehabilitate herself. “She is still very vulnerable,” a friend said. “Last Saturday she said she had the number 666 written onto her bald head. She was crying, and shouting, ‘I am the Antichrist!’ 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.” The “pal” added, “Later that night she tried to kill herself. She attached a sheet to a light and tied it around her neck. Paramedics were called, but luckily she was unhurt.” They also claim that Britney told her estranged hubby Kevin Federline she wanted to take him back, renew their wedding vows and get pregnant.