What is the 1 selling album as of September 2008?

The best-selling album of all time, as of September 2008, was Michael Jackson's "Thriller", which was released in November 1982. It has sold an estimated 66 million copies worldwide, according to sales figures provided by the Recording Industry Association of America (RIAA) and other music industry sources. Since then, newer albums may have surpassed the sales of Thriller.