Adele's album 21 biggest selling album in the 21st century
The album has been number one, on and off, for 19 weeks since its release in January 2011.
It is also the biggest selling album in the 21st century having sold more than 3.8 million copies.
In the singles chart, U.S. rapper Flo Rida climbed two places to number one with "Good Feeling".
Making way was Coldplay's "Paradise" which slipped to number two.
New entrant "Troublemaker" by Taio Cruz went straight to number three.