Los Angeles: Late singer Prince, who passed away last week, was "paranoid" to make a will. The singer, who died at the age of 57, didn't leave instructions as to how his assets should be divided, and according to sources, his advisors had found it "virtually impossible" to get him to sign any legal documents in the last five years, reports tmz.com. "The singer felt screwed over by people who had made him sign various deals when he was younger, and as a result he was paranoid about putting his signature to any legally-binding paperwork," said a source. Prince changed lawyers almost every year, sometimes more often. Though the "Diamonds and pearls" hitmaker frequently switched teams of business professionals, he did have a group of trusted advisers. On Wednesday, Prince's sister Tyka Nelson filed legal documents stating her brother didn't leave a will.