So I already have an iPod Nano, and a iTunes filled with a lot of music. Recently I got a iPod Shuffle, and I also want to use it, but I don't want it to have all the music on it, as on my iPod Nano. So my question is, when I will plug in my iPod Shuffle on for the first time, will it automatically upload all the music from iTunes on it or what, 'cause it does that when I plug in my Nano. And if it doesn't, then how do I transfer music on to the Shuffle, with the iTunes library I already have?