"2Pac’s Greatest Hits tops the 5 million mark in sales this week. It’s the rapper’s first album to reach this milestone. (All Eyez On Me, the last album released in the rapper’s lifetime, has sold 4,472,000 copies.) Greatest Hits debuted at #5 in November 1998 and peaked at #3 in January 1999. 2Pac was shot to death in September 1996."

http://music.yahoo.com/blogs/chart-w...145455807.html

It was officially certified Diamond in June 2011 because it was a double-disc album, however it has now officially passed 5 million (x2)

That's amazing.