If I'm using a bluetooth headset (the phone is away in my pocket) and I tell Siri "Play Madonna", my music will start playing. Then if a few minutes later I want to make a phone call using Siri (or do anything else), but the music has not yet ended, I cannot figure out how to do it. I cannot figure out how to stop the music except for taking the phone out of my pocket. Am I missing something, or is there actually no way to access Siri from a headset when music is playing??