With five number one singles and four number one albums, the Eagles were among the most successful recording artists of the 1970s; at the end of the 20th century, two of those albums, Their Greatest Hits (1971-1975) and Hotel California, ranked among the ten best-selling albums ever, according to the certifications of the Record Industry Association of America. Though most of its members came from outside California, the group was closely identified with a country- and folk-tinged sound that initially found favor in and around Los Angeles in the late '60s, as played by such bands as the Flying Burrito Brothers and Poco, both of which contributed members to the Eagles.