David Van Cortlandt Crosby (born August 14, 1941) is an American singer-songwriter and musician. In addition to his solo career, he was a founding member of both the Byrds and Crosby, Stills & Nash. Crosby joined the Byrds in 1964. The band gave Bob Dylan his first number one hit in April 1965 with "Mr. Tambourine Man". Crosby appeared on the Byrds' first five albums and produced the original lineup's 1973 reunion album. In 1967 he joined Buffalo Springfield on stage at the Monterey Pop Festival, which contributed to his dismissal from the Byrds. He subsequently formed Crosby, Stills & Nash in 1968 with Stephen Stills (of Buffalo Springfield) and Graham Nash of the Hollies. After the release of their debut album CSN won the Grammy Award for Best New Artist of 1969. Neil Young joined the gr