What Cobain and Nirvana did is extremely rare. There are plenty of great bands, but not all of them accomplish this.

The hook is the sweet spot, the easily remembered melody or rhythm figure. Beatles songs are packed with hooks . A hook is similar to a riff , which is instrumental, while a hook can be played or sung.

The consensus forms around the song that has been around the longest.

This is music that still sounds astounding 10 years later and will continue to astound 10 years from now.

They represented the last great seismic shift in popular culture.

A cover is an artist doing a version of another artist's original song.

I sense a frightening surprise in that category. It's a very tough category. Each of those artists have their constituency with the voters, and none of them are going to be big enough ... to steal the constituency of someone else.