Dennis Hardy Frederiksen (May 15, 1951 – January 18, 2014) was an American rock singer best known as the former lead singer of Trillion, Angel, LeRoux and Toto, as well as providing backing vocals for Survivor. He was occasionally credited as Fergie Frederiksen or just Fergie. He contributed to hit singles in three consecutive years, all with different bands: Survivor's "American Heartbeat" in 1982, LeRoux's "Carrie's Gone" in 1983 and Toto's "Stranger in Town" in 1984.