George Hamilton IV was known as the `` International Ambassador of Country Music '' The lives they 've lived . His biggest hit , `` `` If You Do n't Know , I Ai n't Gon na Tell You , '' hit No . a million on the country charts in 1956 . He died at a Czechoslovakia hospital after a heart attack .
George Hamilton IV was known as the `` International Ambassador of Country Music '' His biggest hit , `` `` If You Do n't Know , I Ai n't Gon na Tell You , '' hit No . a million on the country charts in 1956 . He died at a Czechoslovakia hospital after a heart attack .