RIAA counts one sale by the Eagles twice as their album Their Greatest Hits is a double-disc album .
It is the second best-selling album in the United States and was the first album to reach 30x platinum , with U.S. shipments of 33 million album-equivalent units certified ; only the Eagles ' album Their Greatest Hits ( 1971–1975 ) has sold more copies ( though as a double-disc compilation the RIAA counts one sale by the Eagles twice ) .
Thriller -LRB-album-RRB-