Stream audio from Arduino to bluetooth headsets

Hi, Hi all, I'd like to build an Arduino device to stream audio via bluetooth. I already have this and it works fine with my wired headsets. How can I insert a bluetooth module (like this ? to send audio from my Arduino + WTV020SD to any commercial bluetooth headsets.

Thanks all.

I was thinking you could get the usb host shield and add a bluetooth usb module to it, but the tones would probably be slower to get to the speakers. But I have very little experience with audio, so I am not 100% sure I am correct.