My apologies if this has already been discussed.
A couple days ago I was playing Baby in my car, using my cheap cassette iPod player (there's a cable on the cassette which plugs into the iPod), and I guess I bumped the cord and it came about halfway out of my iPod. I could no longer hear Em's vocals, but when the chorus came on, I could hear what sounded like a group of young kids (around 10 years old) singing the baby chorus. I guess my question would be why bother having these kids sing backup if they're inaudible during the actual song?