Bluetooth Stereo Headphones Paired with iPhone AND iPad

I'm looking for a good pair of Bluetooth Stereo Headphones that are capable of pairing with both my iPhone 5 and iPad 3 at the same time.

I would like to be able to listen to music from my iPhone then easily switch to watching a video on my iPad without having to switch the bluetooth off the iPhone, then pair with the iPad and to this again in reverse when I want to switch back.

Is this even possible? Does anyone know headphones that are capable of doing this? Or even better, how to do it with my current LG HBS700 headphones?

Thanks,

iMat74