Do you have loose definition of the term superstar?
The superstars that are in the league that I see are:
A-Rod
Jeter
Big Papi
Manny
Ichiro
Vlad
Reyes
Wright
Pujols
Santana
Chipper
So thats 11 superstars not counting the guys like Maddux, the Big Hurt, Griffey and others who are no longer superstars.