Beyoncé
Dangerously in love- 9m 4.9m in US
B'day- 6m 3.5m in US
I am...Sasha fierce - 7m 3.2m in US
4 - 3m 1.5m in US
Beyoncé- 4m 2.3m in US
Total- 29m 15.4m in US

Rihanna
Music of the sun - 1.5m 0.65m in US
A girl like me - 4m 1.4m in US
Good girl gone bad - 9m 2.8m in US
Rated R - 3.5m 1.2m in US
Loud - 7m 1.8m in US
Talk that talk - 4m 1.2m in US
Unapologetic- 4m 1.3m in US
Total - 33m 10.35m in US

Rihanna has 7 albums not8 and she has sold more than Beyoncé and u can see that more than 50% of Beyoncé 's sales are from the U.S. and less than30% of Rihanna's sales are from the U.S. making her the true global queen not a local star