Who is the most popular star on one?

Please provide more context! "One" could refer to many things, like:

* A specific platform or social media site? Like "Who is the most popular star on Instagram?"

* A specific movie or TV show? Like "Who is the most popular star on the show 'Friends'?"

* A specific sport or team? Like "Who is the most popular star on the Los Angeles Lakers?"

Once you give me more information, I can help you figure out who the most popular star is!