It's really difficult to(nor should we) measure one's success vs. that of another;...but I was thinking about the number of hits each artist has dropped in relation to age and point in their career and I personally think that Rihanna kinda has an edge up and has officially established her own lane of longevity if she keeps it up.

Rihanna - We Found Love ft. Calvin Harris
http://www.youtube.com/watch?v=tg00YEETFzg&ob=av2e

Published on Oct 19, 2011.....149,125,640 views on youtizzy..

Beyoncé(<==peep how I copied the accent right ) - Single Ladies (Put A Ring On It)
http://www.youtube.com/watch?v=4m1EFMoRFvY

Uploaded on Oct 2, 2009.........167,176,742 views on youtizzy..

This is based on simple searches there, sheer boredom, and lemon kush.

no snark involved

"The more a country produces..the richer it is...the better it should take care of it's people. - Dr. Aleida Guevara"