I have major respect for Kenny Chesney and Carrie Underwood and Sugarland. They are wonderful. They're superstars in the music business.
Very few people actually saw Andy's films like Chelsea Girls where he filmed seven hours, ran it on two screens, where each scene was in a different room at the Chelsea Hotel with these people he called 'Superstars" who were basically super-exhibitionists - the guy in one room high on LSD talking about masturbation, Brigid Berlin in another room playing a lesbian and shooting up people with amphetamines right through their jeans, it was all real and they were really doing it (though Brigid is now a proper lady), but you know Andy really did pre-date reality TV.
The giant superstars are people whose talent is so enormous that their death wish can't destroy it.
You become megastars when superstars start reprising your roles.
On a good team there are no superstars. There are great players who show they are great players by being able to play with others as a team. They have the ability to be superstars, but if they fit into a good team, they make sacrifices, they do things necessary to help the team win. What the numbers are in salaries or statistics don't matter; how they play together does.
There are probably guys who could be superstars but aren't because they didn't work at it.