Celebrities these day have a vast competition of popularity with other celebrities these days. For instance, the most popular celebrities have been Miley Cyrus and Justin Beiber because of their irrational decisions on behavior. I'm not saying that their means are the best way, but in a world where people are more interested at the misdeeds of their celebrities than there accomplishments it is hard to gain attention without misbehaving
It seems to be a pattern with young stars, that they have a few years of stardom followed by several years of being in the news for being in trouble. Miley Cyrus is a recent example of a person with a squeaky-clean Disney reputation and a large following among young girls, who then participated in an obscene dancing ritual. Celebrities can do better than this. They could focus on getting in the news for doing the right thing instead of the most shocking thing.
A celebrity has more means these days for getting into the public eye than ever before, and to think that they need to commit crimes to do so is foolish. They say any publicity is good publicity, but if he puts out new music, or offers new products to people he could stay just as relevant.
I don't believe the only way for celebrities to maintain relevance is through unlawful actions. There are many celebrities who maintain their status through great acting or singing. I would say the majority of celebrities are famous because of their enormous skills and if they are stooping so low as to break laws in order to maintain their relevance then they aren't famous, they become infamous.
We have many people in the entertainment industry who never get in trouble with the law. I wish we could actually kick Justin Bieber out of the United States. I think the industry uses these people because they're their own publicity machines due to the fact that they don't know how to properly function in society. We need to stop idolizing these idiots.
No it is not necessary for celebrities to get in trouble with the law in order to keep them famous, they are just spoiled thinking that they can get away with whatever they want and that there will be no consequences. They assumed that since they are famous they have the right to.