Superstar and Somebody

Superstar noun - A person who is widely known and usually much talked about.

Somebody is a synonym for superstar in familiar topic. In some cases you can use "Somebody" instead the word "Superstar" as a noun or an adjective, when it comes to topics like celebrity, important, dignitary, very important person.

Somebody noun - A person who is widely known and usually much talked about.

Superstar is a synonym for somebody in celebrity topic. You can use "Superstar" instead the word "Somebody" as a noun or an adjective, if it concerns topics such as importance, someone.