Stephen Arthur Stills is an American multi-instrumentalist and singer/songwriter best known for his work with Buffalo Springfield and Crosby, Stills & Nash. He has performed on a professional level in several other bands as well as maintaining a solo career at the same time. Stills was ranked #47 in Rolling Stone Magazine's 2003 list of "The 100 Greatest Guitarists of All Time". Stills became the first person to be inducted twice on the same night into the Rock and Roll Hall of Fame for his work with CSN and Buffalo Springfield. He is often considered one of the greatest musician/songwriters of the 20th century.