Some young people like to copy the behavior and clothes of famous people today

Some young people like to copy the behavior and clothes of famous people today.
Why might this be the case? 
What problems can it cause?
Plan: they desire to be like their idols, reason 2: they become crazy
Nowadays, some amount of teenagers inspire to the famous individuals, and children try to copy the behavior and clothes. Therefore, there are plethora of outcomes, what can happen with young people. However, it can lose by the time, when children grow up.
On the other hand, there are a lot of educational famous people, which can be leader for others. Furthermore, children can inspire to them, but on the bad side, they mostly prefer to copy bad behavior. From their childhood, they have some idols or leaders that it will be an example for some kids, because while they are kids, they can not have own opinion, so, they copy celebrities.
Recently, an article was written about large amount of teenagers and their behavior. So, there was written that they can prefer bad style of celebrates, because they think that it is stylish for nowadays, as well as, they want to be cool around their friends. For example, I had one friend who always copied everything from well-known people and she does not care about outcomes. After that, she changed her mind.
Now, we have a plethora of information in the internet and we can use it to good side. So, I think that if children do something in bad side, we can make some decision on this reason.