How can I purge all duplicates from my iTunes library at once?

Someone else asked this question:
Hi
For some reason when I deleted my duplicates it deleted them all from itunes so I had re import them all in and now I have 2-3 duplicates of EVERY song in EVERY album? I have 20GB of duplicates alone! How do I delete them without going mad by deleting individually?"
and it was never answered so I figured I'd make a new thread to try and get some help. I have the same problem in that when I extracted the backup files from my external hdd on my new macbook it created 3-5 duplicates of all my songs. So like the quote above I have 3-5 duplicates of ALL songs from EACH separate artist.
Is it possible to somehow purge all of these duplicates at once, on a macroscopic level? It would take forever to modify individually, as I now have over 27,000 files (originally around 5,500 songs).

Use Option > View > Show Exact Duplicate Items as this is normally a more useful selection. You need to manually select all but one of each group to remove. If the duplicates are clearly grouped in time this may not be too hard to achieve.
Alternatively visit Doug's Scripts and avail yourself of Dupin or Dupin Lite.
Message was edited by: turingtest2 - Posted a Windows solution in error.

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