San Diego [US], February 18 (ANI): Randy Sparks, a Grammy-winning singer-songwriter and the founder of the folk music group the New Christy Minstrels passed away at the age of 90. Sparks died on February 11 at an assisted care facility in San Diego, Variety reported on Saturday night. The news of his death was confirmed by his son, Kevin, who confirmed it to the New York Times, stating that Sparks had been living on his 168-acre ranch in Jenny Lind, Calif., northeast of San Francisco, until a few days before his death. Sparks, an American musician, songwriter, and founder of the folk ensemble …