I honestly dont know how to answer this because fame is one of those things that just...happen.
But it helps to get noticed, too. The best places to get noticed are often at modeling agencies and auditions, but it has been known to happen at talent shows and sometimes in even еще public settings then that, especially if Ты live in the big cities where agents and talent scouts are often found. Im not famous myself, i just get this info through the biographies of new talents btw.