CALIFORNIA, United States?The former manager of pop star Britney Spears must stay away from the singer and her family for three years, a Los Angeles judge ruled Tuesday.

Los Angeles Superior Court Judge Aviva Bobb's order bars former Spears guru Sam Lutfi and the attorney Jon Eardley from coming within 100 yards of the singer and her sons until April 2012.

The court had already issued a temporary order against Lutfi and Eardly in January.

Lawyers for Spears father Jamie, who controls his daughter's estate, alleged the two men had caused the singer emotional distress.

Jamie Spears and lawyer Andrew Wallet were appointed conservators of the star's estate last year in the wake of the singer's much publicized mental health scare when she was admitted to hospital in Los Angeles.

Jamie Spears alleged Lutfi and Eardley had tried to undermine the court ordered conservatorship established last year.

Britney Spears endured a torrid period following her 2006 divorce from ex-husband Kevin Federline, attracting a string of lurid headlines in the tabloid media which culminated in her admission to hospital.

Since then however the singer has gradually got her career back on track, releasing a chart-topping album and beginning her first concert tour in five years last month.