Rihanna sued over unpaid grandma funeral cost?

R&B star Rihanna is reportedly being sued by a company which handled her grandmother's funeral arrangement, claiming that the singer has only paid a quarter of her USD 150,000 bill.
According to TMZ Online, the pop star hired the company to fly her grandmother's body to Barbados. Her funeral later was held in a grand event. The 25-year-old singer wanted to hold a party, completed with tents, multi-media large screens, floral arrangements, and other necessities.
The company claimed that the funeral cost more than USD 150,000. However, Rihanna reportedly only paid a quarter of the total amount and refused to complete the payment. She apparently claimed that the price was exorbitant.

Rihanna's grandmother, Clara Braithwaite whom she called GranGranDolly, died in June 2012 because of cancer.