How can i be a superstar?

I think you should think of it in a different perspective... like "What can I do to become a superstar?" First off, it is my belief that a superstar is made not born. YOU have to take the necessary steps to prepare yourself for stardom. If you think that you have a great voice, then you might have one. What you really need
to do is sing in front of other people and ask their opinion, It is best if it is in front of people you know and are comfortable around you. This is because you can tell them to let lose and not worry about hurting your feelings. Next, if they give you criticisms about your singing, don't take them personally, use them as a constructive tool and learn from them. If they do say that you are a good singer (BTW don't just do it in front of like 2 or 3 people, you need a lot more opinions than that, more than 10.) then you are going to want to take singing lessons. There are several unaccredited people out there, so make sure you are getting the real deal and not wasting your money on a fraud. They're pricey, but working your way up in this world takes money. After a good year or hopefully more, you will have a stronger and more controlled voice, if you have true talent. After that you start auditioning and if you have what it takes, your career will start off there.