former bodyguards to reveal Britney Spears's drug past & crazy sex life?

When seven-month-old Sean toppled out of his high chair and fractured his scalp it wasn't his first fall, an ENQUIRER investigation has uncovered.

Twice before, says a source, the baby has rolled off of the pop princess' bed and crashed to the floor. Doctors say Sean could suffer brain seizures or memory loss for years to come.

Both times Britney freaked out when she was wakened by the sound of her little boy screaming," said an insider. "She found him lying face down on the floor after falling from the bed."It was every mother's nightmare come true. She was so afraid he was hurt. The first time it happened, Sean was just over three months old. Fortunately the floor in Britney and Kevin's bedroom is carpeted and the baby was frightened but uninjured.

"But two weeks later, the same scary thing happened again. Once again Britney woke to find the little guy face down on the floor, crying his heart out. This time she was shaken to the core."