First of all Rihanna album didn't sale 1 million the U.S the album shipped 1 million cpoies that doesn't mean she sold that she sold over 500,000 so far.

Well that Top 10 thing is about to chance when Telephone, Put It In A Love Song and Radio is released

Beyonce has the most

Top5's
Top20's
Top40's
The Most weeks at #1 by a female Artist of 2000's

I could go on but

Just ask Billboard they named her Female Artist of the Decade!