Fernando Flores, who worked with the singer from February to July this year, claims the star had sex in front of him.

In a lawsuit filed in Los Angeles Superior Court, he also accuses Spears of making unwanted sexual advances.

He also claims to have witnessed her punish her two sons with a belt.

A lawyer for Spears' ex-husband Kevin Federline called the case “baseless” and said his client was “satisfied that the allegations are a product of economic motives”.

A lawyer for Spears was unavailable for comment, reports BBC News.

(by Jason Gregory)