I didn't take pics of this fix.. but thanks to this website:
I was able to figure out how to take it apart. Those are some really really small screws.. and thankfully her mp3 player only had a loose battery. Whenever the mp3 player was lightly shaken the power would cut off and only come back on after it was connected to a computer usb. After taking it apart, the solder connections were fine, but the battery wires seemed to be loose on the battery itself. Probably because the battery was floating around dis-lodged from its seat.
After I fixed the connection on the battery and re-glued it into place (with double sided heavy duty glue foam), it works fine now. I wish I had an actual plastic tool for removing plastic shells because now the seem looks a little marred, but at least its working fine now.