Legendary bluegrass singer Ralph Stanley is dead at the age of 89. A family member noted on Facebook that Stanley died after battling skin cancer. Stanley is considered one of the founders of bluegrass music and was inducted into both the International Bluegrass Music Hall of Fame and the Grand Ole Opry. His music found a new audience when he was featured on the soundtrack to the 2000 Coen brothers’ film “O Brother, Where Art Thou?”