Lisa Marie Presley, the only child of Elvis Presley, has died at the age of 54, hours after she suffered a cardiac arrest at the home where she had been living in Calabasas, California. Earlier on Thursday, Presley was rushed to a hospital in critical condition and was said to be in a coma following a 'full cardiac arrest' shortly after she had been complaining about stomach pains, according to TMZ. Her mother Priscilla, who was at her daughter's side, said in a statement: 'It is with a heavy heart that I must share the devastating news that my beautiful...