I had a ton of CDs without cover art. I synced my iPhone and then realized after the fact that I hadn't selected "Get Album Cover Art". So I did. All my album cover art downloaded to iTunes, but the cover art is not on my iPhone. No matter how many times I sync, the cover art just does not go over to the iPhone. How do I do that? Do I have to erase the iphone and resync all the music again?