Image caption Spears is accused of making repeated, unwanted sexual advances towards Mr Flores

A former bodyguard for pop star Britney Spears has filed a sexual harassment lawsuit against her.

Fernando Flores has accused the singer of repeatedly parading around in the nude and having sex in front of him.

Mr Flores also claims Ms Spears caused him emotional distress by having violent quarrels with her boyfriend in front of her two children.

The singer's lawyer did not comment. A lawyer for her ex-husband, Kevin Federline, called the case "baseless".

According to papers filed in Los Angeles Superior Court, Mr Flores alleges that Spears made repeated, unwanted sexual advances and summoned him to her room to expose her naked body.

He also claims that he witnessed the singer punish her young sons with his belt and act inappropriately in front of them.

However Mr Federline's lawyer, Mark Vincent Kaplan, told The Associated Press that Mr Flores' accusations had been looked into before the legal action was filed and warranted no action.

He added his client took allegations of abuse or wrongdoing regarding the former couple's children seriously.

"He is satisfied that the allegations are a product of economic motives. They are as baseless as they seem," Mr Kaplan said.

Mr Flores, who worked for Ms Spears from February to July this year, also accuses his security firm employers of ignoring or mocking his complaints over the singer's alleged actions .