If you want to listen to songs from iTunes, YouTube and rest of the other audio/video applications, you need a Bluetooth stereo headphone not just a regular headset. Bluetooth headset as far as I know are commonly referred to as the one that has monophonic speaker with a microphone which usually only works with phone application but not with YouTube videos and iTunes. Here's a link for a Bluetooth headphone that works with an iPhone that also has a built-in mic:

http://www.ebay.com/itm/Southwing-SA505-bluetooth-stereo-headset-/220906346428?pt=PDA_Accessories&hash=item336f0b57bc

or any one of these

http://www.amazon.com/s/ref=nb_sb_ss_i_0_13?url=search-alias%3Daps&field-keywords=bluetooth+headset&x=0&y=0&sprefix=bluetooth+hea#/ref=nb_sb_ss_i_3_14?url=search-alias%3Daps&field-keywords=bluetooth+headphones&sprefix=bluetooth+head&rh=i%3Aaps%2Ck%3Abluetooth+headphones

Make sure you buy the one that has a built-in mic and not just a standard Bluetooth stereo headphone as it would be a lot more easier to use applications like skype and the built-in phone application. Good luck!

Jai Nepal