Prince's former drug dealer has revealed the full extent of the late-star's secret drug addiction - telling how the superstar was hooked on powerful opiates for over 25 years. Speaking exclusively to Daily Mail Online, the performer's long-time dealer - who asked to be named only as Doctor D - revealed the singer would spend up to $40,000 a time on six-month supplies of Dilaudid pills and Fentanyl patches - both highly addictive opioid pain killers. Prince, who was found dead on Thursday at his home in Minneapolis, Minnesota, was secretly cremated in an intimate ceremony at a nondescript funeral...