I have great news! Yes, you can use iTunes with your RAZR. You can turn to some iTunes music conversion software to convert iTunes music m4p, m4a, aac to Motorola Droid Razr compatible format and then transfer the output files to your Motorola Droid Razr.
Just follow this link to complete this task:
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no, it doesn't work with itunes but, you can use an app like double twist to sync your itunes playlists???