Chilliwack is a Canadian rock band that gained prominence in the 1970s and 1980s. The band is known for its fusion of rock and progressive music, characterized by complex arrangements and extended instrumental passages. The band's most notable members include Bill Henderson, who was the lead vocalist and guitarist, and Brian MacLeod, who played drums and keyboards. Among their influential works, "My Girl (Gone, Gone, Gone)" and "I Believe" are often highlighted, both reaching chart success in Canada and the United States.