how famous??? people can be on google for a lot of reasons...

initially i'd be more curious and then go DANG! and berserk...

if he didn't tell you that he is indeed famous while you were dating, it's either he is a humble dude, which means FAT chance that you can get back with him again...coz u let go of a "famous guy" (if he is all that, then good riddance)

or he was just not into you that he didn't think it's important to tell you...