Adele - 25
As expected Adele's 25 continues to break records. The album is already the biggest-selling album of the year in the US and now it breaks *NSYNC's record. The album has already sold in the US at least 2,433,000 in pure album sales in slightly more than three days. These numbers beat *NSYNC’s single-week record for biggest album sales with their 2000 album, No Strings Attached, selling 2,416,000 units in its debut week! 

And we still have more days left in the sales tracking week so 25 is expected to sell 2.9 million copies in the US alone! Wow and wow!