Crosby Stills Nash - CSN
Crosby, Stills, Nash is a folk-rock supergroup originally formed as Crosby, Stills & Nash by Stephen Stills of Buffalo Springfield, David Crosby from The Byrds, and Graham Nash from The Hollies. In 1969, they were joined by Neil Young, also of Buffalo Springfield, and the band became "Crosby, Stills, Nash & Young".
The band is primarily known for their four-part vocal harmonies. They have a strong association with the Woodstock Festival, having played their second gig there, and they are one of the few North American groups that rivaled The Beatles in popularity in the late 1960s and early 1970s.

