80's - Madonna

90's - Mariah/Janet (Janet HAS to be included in the 90's as well, I mean she sure as hell ain't done much in the 00's yet she is one of the Queens of music - she had her hayday in the 90's along with Mariah))

00's - BRITNEY FUCKING SPEARS!!!

Beyonce's fans are clearly a bunch of fucking idiots to think that her 25 million album selling ass beats out Britney's 90 million albums sold. It's not about talent, it's about the impact you make in the music industry and in pop culture in general. Britney Spears is by far the most talked about, most gawked over, most controversial, biggest selling female artist, biggest comeback making female artist OF THE DECADE. How in the world people think Beyonce can beat any of that is totally beyond me.

Britney Spears MUST have a blade in her knife because she's slit the throats of EVERY OTHER FEMALE ENTERTAINER in the past 10 years, so the title of this post is highly inaccurate.