In reply to You Trippin!!!.

Its not just album sales. Its the overall achievement as well. For example, Oops went on to sell 1.3 million copies in just one week. You dont get that kind of huge sales in one week without a significant impact in the music industry. Also look at their single charts worldwide. For instance in Europe, Britney had so many top 10 hits. Beyonce has a lot too but nothing compared to Britney. Also, Baby One More Time charted No 1 in every single countries it debut, that is something Beyonce never ever achieved yet. Britney also used to be on every single cover magazine in the us, MTV was playing her videos 24/7, her Award performances was always named as one of the most iconic performance of all time, she was the most searched artist of the decades, she was also the only person to perform with both Michael Jackson and Madonna. Sorry, but Beyonce will never achieved what Britney achieved in terms of cultural influence no matter how much album sales she has.