Why can't my iPhone 4 show edited music info? When I use iTunes to edit various song attributes, like adding lyrics, album art, song titles etc, iTunes shows that the song is edited. However, when I look in my iPhone, it is still not edited. How can I make it show what I have edited previously?
You may have to use iTunes to remove the song from your iPhone, sync, then add the song back to you iPhone with another sync.  That will upload a fresh copy of the song with your new metadata to your iPhone.