Somehow my iTunes library has duplicates of a lot of my albums...I must have accidentally added my music folder twice to update the list. If I delete the songs from the library, will they also delete from my hard drive? I'm not deleting from a playlist, but from the main library. I couldn't find any info on this on the Apple site. I want to clean up my library and get all the album artwork in there, because most of the stuff I've uploaded to my phone doesn't show the artwork.

Thanks