The brother of country music icon Loretta Lynn has died a the age of 76. Donald Webb was one of Lynn's and Crystal Gayle's four brothers. He was also musically inclined, having contributed to Gayle's 1978 album, "I've Cried the Blue Right Out of My Eyes." Webb died on Friday, October 13th, at his home in Wabash, Indiana. His cause of death was not revealed.