iDupe is a smart duplicates scanner for iTunes. It tries to deal with duplicate songs or albums in iTunes in a smart way.

Features:

• Can make smart judgement calls about duplicates
• Lets you make final judgement calls before removing or deleting anything
• Can remove tracks from playlist and/or library relatively fast
• Can move files to trash and also trash empty parent folders

Detailed feedback is needed about areas where you wanted iDupe to make a different call than it did.