'Umbrella' star sued

R&B star Rihanna has been sued by a university professor for allowing her house guests to trespass on his property. The UCLA design and media art scholar Christian Moeller, whose home is next door to the singer’s rented Los Angeles residence, has filed suit against her, claiming that her friends regularly dump their cars on his lawn, reported a celebrity website. Moeller has sued the Umbrella hitmaker for allowing people and cars to trespass on his property.