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.
Adrienne Bailon Adrienne Eliza Houghton (née Bailon; born October 24, 1983) is an American singer-songwriter, recording artist, actress, dancer and television personality. Adrienne Bailon first became publicly known when she rose to fame as one of the founding members and singer of both 3LW (1999–2007) and Disney's The Cheetah Girls (2003–2008).