Currently Being ModeratedFeb 7, 2013 1:44 PM (in response to Jacqueline237)
If the music was purchased from the itunes store you can it download it again to the other device, from the store.
Otherwise, you would have to sync music form your itunes library on a computer to the device.
Currently Being ModeratedFeb 7, 2013 1:45 PM (in response to Jacqueline237)
You don't. YOu need to either sync those two devices to the same computer and use the same Apple ID on both of them, or you use the same Apple ID on each device and download the songs from iTunes.