"Interesting" that Rihanna continues to sell at least 20K a week, surpassing weekly sales of artists who were released the same date as her or later (check numbers for Adam Lambert, Robin Thicke).

And certifications always happen early, and never represent actual sales. She's sold more than 500,000 Sam.

What are Chris Brown's sales, hmm? He's not even charting anywhere. I'm guessing like 1K a week now.