She was screaming I am the anti christ. She wrote 666 on her forehead. WOW. She has lost it.

BRITNEY Spears has flipped her lid in rehab, trying to hang herself with a bedsheet after screaming “I am the anti-christ” to frightened staff.

She made the demonic cry after scrawling the devil’s number “666″ across her head.

Within days of her suicidal behaviour, Spears - who was in and out of rehab before shaving her own head and later attacking a photographer’s car with an umbrella - was begging estranged husband Kevin Federline not only for a reconciliation, but demanding she wanted to soon have another baby.

The ordeal began when she terrified staff by writing the number of the beast on her head and running around the clinic screaming, “I am the anti-christ!”

“The clinic people just didn’t know what to do,” a friend claimed.

The pop star then tried to hang herself with a bedsheet was but was found before she could hurt herself.