Are you only talking about touring? As far as putting out new music, doing promo, performances, and appearances on a regular basis...Rihanna
Being in the public eye all the time and putting an album out every november doesn't mean you give good work ethic It's clear that Bey puts more effot into her music and performances than Rihanna does.
Beyonce. But Rihanna's worth ethic is pretty good and often underrated. I think its also impressive how her worth ethic and her as a entertainer overall is improving as shes gone on, despite releasing every year. Shows a growing passion to work on her craft.
Both women have incredible work ethics. I don't understand why so many people like to say that Rihanna doesn't work hard when she's recorded 7 albums in as many years, all while touring the world and pursuing countless ventures outside of music.