Late singer D'Angelo's daughter, Imani Archer, is expressing her grief in a heartfelt letter penned just a day after his death. The "Brown Sugar" singer died from pancreatic cancer on Tuesday, October 14. "Dear daddy, there are no words to describe this immeasurable loss. I'm in absolute disbelief and shock. You were my biggest hype man, my protector, my biggest musical inspiration, the kindest and most selfless man, and the best father anyone could've ever had," Imani wrote in an Instagram post on Wednesday, October 15, alongside several photos of herself and her father.