In reply to FAF.

Rihanna has sold 37 Million albums worldiwde,,,,,

This is confirmed by vogue... she has sold over
100 M singles WW

Nicki has sold 3 Million WW
Her singles 20 Million.... granted she releases at least 3 singles a month feature or no feature....

clearly we see who the top boss is.....

Rih > Nic
100 M > 3 Mil
37 M > 20 Mill

Talk That Talk Sold a Million off

3 Videoes WHYB WFL and YDO
(if count features POC & TC)

Nicki has sold 6ook off..

I AM Your Leader
Stupid Hoe
Pound The Alarm
Starships
Beez In Da Trap
Come On a Cone
Right By Myside
Va Va Voom
The Boys
Turn Me On
(if we count features Luv Em Strippers and many others)