Karaoke in my X

[Bunyan]

I was mildly surprised today when I found a new feature on my bluetooth phone hookup.
I was on the road for business and was trekin along when I decided to record myself singing along to the radio with my iPhone's voice recorder.
I went to play it back and was holding the phone to my ear when all the sudden the horrible remix of the previous song was blaring out of my X's speakers. I had no idea the playback of the voice recorder will play thru the Bluetooth phone hookup.
Needless to say the rest of the ride was filled with mediocre karaoke. :-)
If the voice recorder can playback on the cars speakers there's gotta be a way to play the iTunes music back as well.
Figure I'd thro it out there for you road worriars who are looking to kill some time.