I hate the new look. There is how to change iTunes back to the old look completely!

http://erambert.me/itunes-109/

If you just want to change the icon.

1. Go to your itunes app on applications folder
2. Right click > Show package contents > Resources
3. Drop a .icns file and replace the file (Back up the original .icns just in case)

Here are some places to find other .icns files!

Orignal iTunes 9 Icon

http://dl.dropbox.com/u/1892/6ix%20Passions/Files/iTunes.icns

Others

http://mattiasekstrom.deviantart.com/art/iTunes-10-Revised-177699346

http://jonas.seph.ws/prytunes/prytunes.zip

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