Oh, this is crushing. Kelly Osbourne lost her father Ozzy Osbourne this week. The Black Sabbath frontman had ferociously battled Parkinson's disease for years before he died unexpectedly on Tuesday. Related: Ozzy Seen Happily Hanging With Kelly & Grandson Just Two Days Before Death Now, late Thursday afternoon, the 4o-year-old reality TV star has shared some meaningful lyrics in tribute via Instagram Stories: "I feel unhappy I am so sad. I lost the best friend I ever had." Those words come from the 1972 song Changes, which she and he would later redo as a duet in 2003. Poor Kelly.