Rihanna has launched a lawsuit against her former accountants, claiming that they lost her millions in earnings.The ‘Birthday Cake’ singer filed the suit on Thursday (July 5), blaming the ex-accountants for bad bookkeeping, an ongoing audit by the IRS, and failing to recommend that she cut down on expenses during her struggling 2009 tour.The AP reports that Rihanna claims her ‘Last Girl on Earth’ tour had "significant net losses”, while her accountants pocketed 22% of the tour’s earnings and paid her only 6%.According to the court filing, the singer is seeking unspecified damages from the New York-based firm. AP