Using Android Smartphone as PC audio output?

Is there a way to make my Samsung Galaxy S output whatever is playing in my Windows 7 PC? So that I can plug speakers o headphones to the phone and hear the same thing as I would hear if I plugged them to the PC directly (signal from integrated Realtek audio, don't need the phone to work as sound card, just as a headphone jack). I don't care if it's through Bluetooth or USB or WiFi, just hoping if there was an app for it.

Thanks.