I frequently am unable to understand song lyrics. In the song that goes "I ain't no holler back girl" it sure sounded like she was saying "I ain't no Hall of Fat girl." Not that it made any sense, but it's what it sounded like to me.
You may enjoy reading this so you know just how common it is:
Mondegreen - Wikipedia, the free encyclopedia
Listen to American broadcasts, watch American TV (if you can stand how stupid most of it is) and watch American movies.
(I don't find the many American accents superior to any other, though, so I would still encourage you to watch the far better English television shows, Australian movies, etc.)
Student or Learner