The man in charge of looking after Britney Spears has claimed he has an explosive story filled with sex to tell in his new book.

Fernando Flores, who previously filed a sexual harrasment case against Spears, claims that his time working for the 'Femme Fatale' star saw him confronted with his clients wild and hedonistic lifestyle.

"Britney has a huge sexual appetite and, from what she told me, her tours were an anything-goes environment," a friend of Flores told The Sun. "I heard stories of threesomes, orgies, girls making out - things that would make your hair stand on end.

"She had a lot of young, attractive dancers around her on tour, and things would get crazy. There was drinking, drugs, steamy sessions in hot tubs, all sorts of things."

Adding: "I was in her bathroom and saw this picture of her in a tub with some girls," he said. "It was very sexual. She told me, 'That was on tour and s**t got crazy'."

Britney recently got engaged to her partner Jason Trawick.