Rihanna is being sued by her neighbour.

Christian Moeller – who lives next door to the star's rented Los Angeles home – has started legal proceedings against the 'Umbrella' singer because she is allegedly driving her cars over his front garden and ruining his grass.

The lawsuit, which was filed at Los Angeles Superior Court yesterday (16.06.09), states the 21-year-old pop star allows vehicles to travel over Moeller's lawn to get to her driveway and the cars are regularly abandoned on his estate.

Rihanna rents the mansion from Stephen Yacobian, who is also named in the lawsuit.

Yacobian made an agreement, called an easement, with Moeller giving permission for cars heading towards Yacobian's home to drive on a section of the university lecturer's lawn.

However, the house was remodelled and Moeller claims the easement is now redundant and should be revoked.

Moeller also alleges a security camera – which Rihanna had installed in the Hollywood Hills mansion – points directly onto his property.

He is seeking unspecified damages for invasion of privacy, trespass, legal expenses and the revocation of the former agreement.