The singer's second LP 21 secures its third week at number one, while Bruno Mars and Rihanna remain in their respective top three spaces. Imelda May's two entries swap positions to complete the top five for a second week.
This week's highest new entry comes from Roberta Flack, whose Love Songs collection debuts at number 10.
James Blake's self-titled LP misses out on the top 10, entering at number 11. Celine Dion's My Love - The Essential Collection climbs to number 20. Other new entries in the top 30 come from The Streets at number 22 and Barry White at 27.
Elsewhere, Nick Minaj's Pink Friday climbs into the top 40 at number 39.
This week's top 10 in full:
1. (1) Adele - '21'
2. (2) Bruno Mars - 'Doo-wops & Hooligans'
3. (3) Rihanna - 'Loud'
4. (5) Imelda May - 'Love Tattoo'
5. (4) Imelda May - 'Mayhem'
6. (6) Adele - '19'
7. (8) Katy Perry - 'Teenage Dream'
8. (7) The Script - 'Science & Faith'
9. (10) Justin Bieber - 'My World'
10. (*) Roberta Flack - 'Love Songs'