Beyoncé wins with album sales but Britney slays her in terms of singles.
TTWE outsells her entire 4 era
Some of those 4 singles weren't even certified plastic.
Britney was named the best selling act by Billboard, though. Beyoncé ranked higher because of radio, not because of actual sales.
The RIAA is based solely on sales and certifications, they named Beyonce the Artist Of the Decade.
Quote:
Put a championship ring on it: Beyonce was far and away the queen of gold and platinum sales milestones during the past decade.
The RIAA on Wednesday released a compilation of its awards for 2000-09, and the heavily Grammy-ed songstress leads the field with 64 certifications, including albums, digital songs, master ringtones and music videos. The one-time Destiny's Child singer also led the league in ringtone certifications with 19.