What are the 10 most expensive cities to live in America?

I understand LA is #1 but a colleague is challenging that.

Public Comments

1. LA i definetly number 1 but NYC is expensive Miami is to. I live n ATL I think it is expensive but I do not know regarding the whole country
2. According to Forbes: 1. NYC 2. LA 3. Miami 4. Honolulu 5. SF 6. Chicago 7.; White Plains, NY 8. Houston 9. Boston 10. Washington, DC.