Pink Floyd's 'best of' compilation "Echoes" managed to shift quite a significant number of copies last year, making it to the 16th biggest selling album in the world of 2001, despite coming out at the tail end of the year. Billboard have collated sales numbers worldwide; "Echoes" sold 4.8 million copies. Top seller of the year was Dido's "No Angel" with 8.6 million copies...