"More Famous" is an arbitrary concept. There is no way to properly gauge which one is known by a majority of the general public without doing extensive polling.
Since that data does not exist any answer provided by the participants of this site would only be opinion based and not a substantial answer.
Most likely Mario
Justinhas more Google results.
Shrek
justin timberlake makes about 1 milion a year.
Carly Rae Jepsen, Justin Timberlake, back up singer to Beyonce, and more
justin timberlake is my homie mo'fos.
justin Tinberlake
Michael Jackson
lionel messi
Most likely Mario
darth varder
Justinhas more Google results.
It's very difficult to measure things like this, but I sure hope it's Shrek.
Cristiano Ronaldo
Justin Timberlake!! He is been in a bunch of movies and shows, won a ton of awards, been in a lot of music videos, and sang way more songs. And besides, he was in NSYNC, which automatically makes him a ton more famous!!
Niether they both are stupid. The only real famous person is Justin Timberlake!!
shrek is the most famous