"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.
Your question cannot be answered with the information currently available.
"More Famous" is too idiomatic to provide an adequate answer without poll data from various areas & age groups, perhaps even from different socio economic groups.
Without any data of this sort there is no way to really determine which person is more widely known to the general populace therefore any answer would really be speculation, opinion and/or conjecture from the individual who answered.
Shrek of course!
Shrek
Shrek
Most likely Mario
Justinhas more Google results.
justin timberlake makes about 1 milion a year.
Shrek
Carly Rae Jepsen, Justin Timberlake, back up singer to Beyonce, and more
justin timberlake is my homie mo'fos.
justin Tinberlake
darth varder
Most likely Mario
Michael Jackson
lionel messi
Justinhas more Google results.
Cristiano Ronaldo
It's very difficult to measure things like this, but I sure hope it's Shrek.
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!!
Justin timberlake because Justin timberlake has more sexy, ripped, six pack abs then gewn stefanie.