SALES ARE MORE IMPORTANT. Beyonce sold 3M with Mediatraffic and 3.3M with Music-charts so it sold 6.3M together, in just 5 months. So maybe in a year it will sell 6.3M x 2 = 12.6M
12.6M IN A YEAR IS HIGHER THAN 6M AFTER 2 YEARS.
This is a mystery to me. I just don't get it. If Shakira had a big hit like 'Happy' or even 'Talk Dirty', this album would have destroyed the charts. I don't understand why their sales (Pharell and Jason) are so low.