Graham Stack  has written and produced hit records for many artists including a singer who relinquished her American what?
Tina Turner Tina Turner (born Anna Mae Bullock; November 26, 1939), is an American-born Swiss recording singer, songwriter, dancer, actress, and author. Born and raised in the Southeastern United States, Turner relinquished her American citizenship after obtaining Swiss citizenship in 2013.
Cam (singer) Cam (born Camaron Marvel Ochs; November 19, 1984) is an American country music singer and songwriter. Her music incorporates elements taken from contemporary pop music. She began her career as a songwriter, composing material for several artists including Miley Cyrus. In 2010 she released her debut studio album on an independent record label.