Joni Mitchell Archives, Vol. 4: The Asylum Years (1976-1980)

Since her debut album in 1968, Canadian musician Joni Mitchell has released 19 studio albums, most recently 2007's Shine. Her most commercially successful period was the early-mid 1970s, which included 1970's Ladies of the Canyon, 1971's Blue and 1974's Court and Spark, all three of which reached Platinum status in the US. In the United States alone, Mitchell has accrued record sales of 7 million certified by the RIAA. In the UK, she has certified sales in excess of 1.3 million copies.