Find and remove duplicate items in your iTunes library
Learn how to find and remove all items that show up more than once in your library.
Choose View > Show Exact Duplicate Items.
Matches are based on the song name and artist. If you have multiple versions of the same song (for example, live and studio versions, or versions from different albums) you can hold the Alt or Option key (for Mac OS X) or the Shift key (for Windows) and choose View > Show Exact Duplicate Items. This will show only duplicate songs having the same name, artist, and album.
Duplicate items will be sorted next to one another. Review each item to determine which one you'd like to remove from your library. You can compare the track length, date added, genre, play count, size, bit rate, and more to help you determine which item you'd like to keep and which item you'd like to remove.
Select the duplicate you want to delete. Remove it by choosing Edit > Delete.
When you are finished removing duplicate items from your library, choose View > Show All Items.