on my commercial long xcross country i was flying over Charlotte, (very bored) when i decided to sing along with the only radio station i could pick up on the ADF , radio Disney. I had no idea the that hand mic transmitted over the radio when the button was pressed instead of the intercom. so after my incredibly bad rendition of a very embarrassing song of which i will not name, Charlotte approach comes on " air craft who was just singing say your dam tail number" me no response