Soft rock was prominently featured on many Top 40 and contemporary hit radio stations throughout the 1970s. Soft rock often used acoustic instruments and placed emphasis on melody and harmonies. Major soft rock artists of the 1970s included Carole King, James Taylor, Billy Joel, Chicago, America and Fleetwood Mac, whose "Rumours" (1977) was the best selling album of the decade. (See the country music section of this article for more about country music that crossed over onto the pop charts.) Bob Dylan's 1975–1976 Rolling Thunder Revue reunited him with a number of folk-rock acts from his early days of performing, most notably Joan Baez.