How many albums did Britney Spears sell?

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Tags

1. #grammy
2. #britney
3. #nearly
4. #platinum
5. #multi
6. #music
7. #entertainers
8. #winning
9. #singles
10. #million
11. #alone
12. #award
13. #successful
14. #history
15. #nielsen
16. #spears
17. #celebrated
18. #records
19. #albums
20. #according
21. #worldwide
22. #songs