Gray, duplicated songs
My iPod has roughly 60 songs that it has duplicated. The duplicates have gray text, no cover art, cannot be played, and cannot be deleted. They show up in my music library as separate songs, so although I only have about 350 songs, my iPod says I have about 400. There are three songs that I deleted from my iPod ages ago that show up like this too, as well as one song that my iPod deleted on its own and kept the gray version. Solutions?
(Note: The USB ports on my computer no longer function, so I can't sync with a computer)
iPod touch, iOS 6