Rihanna has reportedly filed a lawsuit against her former accountants for losing track of millions of dollars.

The pop star is upset about the way New York based accountancy firm Berdon LLP and two other accountants managed her tour profits.

Fox News reports that legal documents allege that the bookkeepers "engaged in misconduct and malfeasance" that resulted in tens of millions of dollars of losses from her 2009 Last Girl on Earth tour.

The 24-year-old singer, who filed suit under her real name Robyn Fenty, hired these accountants when she was an emerging star at the age of 16.

Representatives for the accountants have no comment on the matter at the moment.

Rihanna is currently in bereavement as her grandmother Clara Dolly Brathwaite passed away earlier this week in New York after battling cancer.

"Goodbye #grangranDolly get your beauty rest until I see you," she wrote on her Twitter profile as an expression of her grief.