The Byrds were an American rock band formed in Los Angeles, California, in 1964. They fused traditional acoustic folk with electric rock sounds and pioneered the genre "folk rock". The bands signature sound was the harmony singing of Roger McGuinn, David Crosby, Gene Clark and Chris Hillman. McGuinn, who is the only remaning consist member of the band, also played his jangly 12-string Rickenbacker guitar and influenced pop music up to the present day. Their biggest hit was a cover version of the Bob Dylan song "Mr. Tambourine Man", peaked at number 1 on the Billboard chart in 1965.