The big announcement on Sunday about Beyonce's pregnancy could help push her '4' album back into the Top 10. Chart watchers predict a possible 40% sales increase after the announcement and her performance of 'Love on Top' at the MTV Video Music Awards.

Beyonce's '4' debuted at No. 1 in June but has since slipped to No. 12, with declining sales each week since its release. The first two singles, 'Run the World (Girls)' and 'Best Thing I Never Had,' failed to reach the Top 10, but the record continues to sell, moving 21,000 units last week.

The projected figures for this week show possible sales of 30,000 to 40,000, which would boost the album back into the Top 10. Lil Wayne is running away with the No. 1 spot with his new album 'Tha Carter IV.'

Awards show performers often see a bump in sales, but that could be especially true in Beyonce's case. Her exuberant performance on the telecast may compel those who have not yet checked out '4' to give it a listen. And people clearly can't get enough of the news, seeing as how the chatter about Beyonce's pregnancy broke the all-time Twitter record.