Believe it or not, there are still some members of the American public who don't own Adele's '21' album. However, that pool is a lot smaller than it used to be, after nearly three-quarters of a million people purchased the record last week, giving '21' by far its biggest sales week yet.

As reported by Billboard, the 730,000 copies eclipses the album's previous best week, when it sold 399,000 during the Christmas shopping season. The surge in sales comes after Adele was the star of the 2012 Grammy Awards, taking home all six awards for which she was nominated, including Album of the Year.

Appropriately, '21' has now spent 21 weeks at No. 1 on the album chart. That passes the 20-week reign of Whitney Houston's 'The Bodyguard' soundtrack. It ties for the 8th-most weeks at No. 1 in history with MC Hammer's 'Please, Hammer, Don't Hurt 'Em.' The next targets for Adele: Prince's 'Purple Rain' and the 'Saturday Night Fever' soundtrack, which both spent 24 weeks atop the chart.

Here's another interesting piece of trivia: Not counting albums that have been out for less than a month, and excluding the Christmas season (when album sales typically go through the roof), the 730,000 copies Adele sold of '21' this week are the second-most by any album in any week in history, behind only the 848,000 the 'Titanic' soundtrack sold during Valentine's week in 1998.

Adele's debut album, '19,' also sees a huge sales surge, shooting up to No. 4. The remarkable vocalist's remarkable success just won't quit!