at least it's a cool song
Same issue for me. Not plugged in, no prompt, no wireless keyboard, no buttons pushed, no nuttin. Happens every few days and just happened today in the middle of a business meeting: Itunes just starts on my iphone and anyone nearby can hear it. It always goes to the same song and only that song.
Phone was just sitting on the table today. Happened last week in the middle of a phone call. I'll keep checking here for solutions, but since no one is touching anything when this happens and it is completely random, I'm not optimistic.
Fortunately, it's a cool guitar instrumental, so no one is put off by the music. But it is poltergeisty (new adjective; you heard it here first).