[yummyfajitas]

CEO pay is usually linked to performance as well. Most are paid primarily in stock options or performance linked bonuses.

Unless you want to claim that Lady Gaga's performance is superior to that of Johnny Cash, I don't think you can explain the increase in musician pay by performance increases.

[cyrus_]

Its not about who is a better musician, its about who can sell more albums, concert tickets, etc. In that respect, Lady Gaga knows how to work pop culture like few others.