Sturgill Simpson is an American country music singer-songwriter. He has released two albums independently, "High Top Mountain" and "Metamodern Sounds in Country Music".Sturgill Simpson is an American country music singer-songwriter. He has released two albums independently, "High Top Mountain" and "Metamodern Sounds in Country Music".Sturgill Simpson is an American country music singer-songwriter. He has released two albums independently, "High Top Mountain" and "Metamodern Sounds in Country Music".