By Brandy McDonnellNASHVILLE, Tennessee – American music icon Mac Davis - a respected country music singer-songwriter who also penned Elvis Presley's hits "In the Ghetto" and "A Little Less Conversation" died Tuesday in Nashville, Tennessee, following complications from heart surgery. He was 78. “Thank you, dear Lord Jesus, for letting us know the man to whom you gave the most incredible talent,” said Oklahoma native Reba McEntire in a statement.Read more on NewsOK.com