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.
Sylvia Moy Sylvia Rose Moy (September 15, 1938 – April 15, 2017) was an American songwriter and record producer, formerly associated with the Motown Records group. The first woman at the Detroit-based music label to write and produce for Motown acts, she is probably best known for her songs written with and for Stevie Wonder.