If Britney or Rihanna rank ahead of Mariah because of BRAZIL, I will be collecting wigs. Brazil should not be counted AT ALL unless you're going to use their airplay chart. Their main chart is from post 2009.
Touch My Body was #1 on Brazilian Airplay, We Belong Together was #1 on Airplay, and Don't Forget About Us was #1 on Airplay. Those are all pre-09, it's unfair not to count them and only count I Want To Know What Love Is. Esepcially considering Rihanna's career started only 4 years before their main chart debuted.