Malcolm Young, guitarist and co-founder of pioneering rock band AC/DC, has passed away, the band said in a statement Saturday. He was 64. "With enormous dedication and commitment he was the driving force behind the band," the band said on its website. "As a guitarist, songwriter and visionary he was a perfectionist and a unique man. He always stuck to his guns and did and said exactly what he wanted." Young founded the Australian rock band with his brother Angus in 1973.