The star is set to lose her title and give up the top position to the US band Foo Fighters.
The band are expected to go straight to number one with their new album Wasting Light, knocking Adele's album 21 down to number two.
Adele's hit album has broken records for its long stint at the top of the charts and has sold almost 2 million copies since it was released 12 weeks ago.
Glee's new cast album, Volume 5, is also expected to chart highly and enter the charts at number three while Adele's first album 19 is also still in the top ten at number four.