Princess of Pop? She's successful, but some of these reasons
Even at her peak, Rihanna doesn't match the sensation of Madonna or Britney. We Found Love was big, but did nothing for TTT.
And some of you deny Gaga because it's only been 4 years vs Rihanna's 7. Considering Gaga's 4 years outdo Rihanna's 7, why do you assume Gaga won't continue to outpace her?
I will say Umbrella is iconic, definitely.