Not shocking: Adele's 25 is selling like mad since it was released Friday. Somewhat shocking: The record it just broke was previously held by ... *NSYNC. As Billboard reports, 25 had sold at least 2,433,000 copies as of Monday, meaning that in just over three days of sales, Adele broke Nielsen's record for single-week US album sales. Nielsen started tracking those numbers in 1991, and *NSYNC previously held the record with 2,416,000 sales of No Strings Attached during its debut week in 2000. (Adele also had the best-selling album of 2011.)