PASADENA, CA - JUNE 01: Musician Prince performs onstage during the 2007 NCLR ALMA Awards held at the Pasadena Civic Auditori
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Prince's sister, Tyka Nelson, has filed papers concerning the late rocker's estate, as she believes he did not leave a will.

Nelson is petitioning for the appointment of a special administrator to handle Prince's estate, which has been valued at $300 million following his death on April 21 at the age of 57. According to USA Today, Nelson said that she does not "know of the existence of a Will and [has] no reason to believe that [Prince] executed testamentary documents in any form."

The reason for Nelson's request lies in her concern for the wellbeing of Prince's assets: In her petition, she said that "immediate action and decisions need to be made to continue the ongoing management and supervision of [Prince]'s business interests; and because the names and addresses of all interested parties are currently unknown."

Prince's apparent lack of a will came as a surprise to his associates. USA Today goes on to say that his former manager, Owen Husney, thinks it odd that the musician wouldn't have had his affairs in order regarding his will and estate plan, and said that Prince was "too smart to have overlooked something that crucial."