I have done my research and here are just a few quick notes.
Britney has 2 Diamond albums. She has over 100 million Albums sold worldwide by 2010. Over 100 million videos Worldwide by 2012 or 2013 all RIAA certified, this is all in the midst of the download era.
Britney also holds 6 Guiness world Records.
1) Best-selling album by a teenage solo artist
2) Best-selling teenage artist of all time
3) Fastest most no. 1 in UK chart
4) 5th Best Selling Female Artist In Music History
5) Most Searched Person (2008)
6) Youngest Female Artist To Have Six Of Her Albums Reach #1 On The Music Charts (2011)
So if any other female music artist can make that claim, be my guest.
Also, some people want to make her the Queen of POP, however, it would be nice, I think Madonna has had a great influence on Britney to make her who and what she is today. So Madonna will always be Queen.