Prince hadn't made a will 'because he was too paranoid to sign anything after being screwed over as a young star' - as sister calls for fortune to be split between six siblings

Prince never made a will because he was scared of being 'screwed over' by putting his signature on legal documents, it has been claimed.

The legendary singer, who died on Thursday aged 57, is said to have been 'paranoid' after having problems with contracts in his younger years as an emerging star.

It comes as his sister Tyka Nelson yesterday filed paperwork in a Minneapolis court saying he has no known will and requesting to be appointed executor of his estate.

Potential heir: Prince's sister Tyka Nelson (left) was seen mourning over the loss of Prince (pictured right last year) outside his Minnesota compound after what seems to be a private memorial service last week

Prince (pictured last year) died at age 57 on Thursday at his estate in suburban Minneapolis. Police are probing doctors who may have supplied the singer with drugs 

Sources told TMZ he jumped from lawyer to lawyer almost every year and it was almost impossible to get his signature on any legal documents. 

Nelson's court documents stated: 'I do not know of the existence of a will and have no reason to believe that the decedent executed testamentary documents in any form,' said Tyka in court documents, according to TMZ.

Also in the documents Tyka lists herself and Prince's half siblings John, Norrine, Sharon, Alfred and Omarr as beneficiaries of the fortune which was recently estimated to be around $150million despite earlier reports that it was as high as $800million. 

Prince's parents, John L. Nelson and Mattie Shaw, are both dead and Tyka is his only full sibling. 

Prince's father John had three daughters and two sons from his marriage to Vivian Nelson - Lorna, Norrine, Sharon, Duane, and John.

Lorna passed away in 2006 and in 2011 her brother Duane died.

Then, after her divorce from John, Prince's mother Mattie remarried and gave birth to two sons, Omarr and Alfred.  

Nelson is Prince's only surviving full sibling.

Nelson says in her filing that an emergency exists because immediate action is necessary to manage Prince's business interests. 

She added that an administrator was needed 'because no personal representative has been appointed in Minnesota or elsewhere.' Nelson proposed the Bremer Bank in Minnesota for the administrator role, saying it had done business for years with Prince, a Minneapolis native. 

Tyka Nelson holds a rose outside Paisley Park, the home of her brother Prince in Chanhassen, Minnesota on Thursday. She claimed in court documents that Prince has no will 

Next in line: Tyka is a former crack addict who turned to prostitution to support her two young sons before getting clean during a 2003 trip to rehab

Minnesota-based attorney Stephen Hopkins said it was unusual for a person of Prince's stature and wealth to die without a will. In such cases, assets are split evenly between the heirs, Hopkins said.

'This (case) is going to be open for some time, probably for some years,' Hopkins, of the Minneapolis firm Henson & Efron, said in an interview.

He said the administrator's first job would be to ascertain all of Prince’s assets, paying any debts he owed and paying taxes.

Tyka and her brother were close in recent years after a difficult stretch in their relationship when Tyka was struggling with an addiction to crack cocaine and prostituting herself to support her two young sons, Sir Montece Laeil Nelson and President LenNard Laeil Nelson.

With some $27 million in property and an outpouring of nostalgia over the pop star's death, Nelson and Prince's half-siblings could stand to inherit a small fortune. The size of the fortune isn't clear, and recent disputes suggest money was tight. The most recent estimate of the hitmaker's fortune is less than $150million.

At first, Prince was rumored to have an approximate net worth of $300million, which does not include the millions his estate is set to make in the coming weeks from the increased sale of merchandise and music or the money the singer received when he signed a deal agreeing to stream all his music on Tidal.

Days before his death, Prince tweeted a photo of the piano intended to be a centerpiece of his scheduled tour. The acoustics of the piano were fine-tuned to Prince's specifications

His music catalog meanwhile is worth over $500million according to Prince's first manager Owen Husney, due in large part to the fact that unlike other artists he owned both his master recordings as well as his own music publishing.

Prince also has a large collection of unreleased music, which Husney believes may include an album he made with jazz great Miles Davis 

But sources say the figure was grossly exaggerated and that the singer, who lived in his $10million Paisley Park mansion, spent far more than he made.

The Purple Rain hitmaker's lavish lifestyle and refusal to 'sell out' and allow his songs to be used in lucrative adverts or films left him cash-strapped, sources who are familiar with his finances told TMZ.

He was also spending up to $40,000 a time on six-month supplies of Dilaudid pills and Fentanyl patches - both highly addictive opioid pain killers - his alleged long-time dealer told DailyMail.com 

Prince died at age 57 on Thursday at his estate in suburban Minneapolis. 

Police are believed to be refusing to rule out criminal homicide charges over Prince's death as they probe doctors who may have supplied him with drugs, it was revealed on Tuesday.

The singer was found collapsed in an elevator in Paisley Park, his home and vast recording studio in Chanhassen, Minnesota on Thursday and was declared dead.

Officers have already said there was no indication of suicide but there have been claims that the rock legend had an opium addiction and had been treated for an overdose of the powerful painkiller Percocet while traveling home from concerts in Atlanta last week.