The Tottenham titan now finds herself in sixth position having already passed Pink Floyd's Dark Side Of The Moon on Monday.
Upon passing Pink Floyd, Adele found herself only 12,000 sales behind 21 with many, rightly, predicting that she would leap Mark Knopfler's band by the end of the week.
The singer now faces Michael Jackson's Thriller if she wants to progress into the Top 5 of the UK's biggest-selling album list.
The Top 10 now stands as follows:
01 GREATEST HITS - QUEEN
02 SGT PEPPER'S LONELY HEARTS CLUB BAND - THE BEATLES
03 GOLD: GREATEST HITS - ABBA?
04 (WHAT'S THE STORY) MORNING GLORY? - OASIS?
05 THRILLER - MICHAEL JACKSON?
06 21 - ADELE
07 BROTHERS IN ARMS - DIRE STRAITS?
08 THE DARK SIDE OF THE MOON - PINK FLOYD?
09 BAD - MICHAEL JACKSON?
10 GREATEST HITS II - QUEEN