IPod Overheating

I have an IPod Nano that is approximately 2 years old. Recently I plugged it into my computer to charge it, and after about 30 seconds I noticed a burning metal/ozone type smell. I picked up the IPod, and the top (above the screen) was so hot it burned my fingers. I immediately unplugged the IPod from the USB port, and turned it on, and it still worked. I did all the steps to reset and restore the Nano, plugged it back in to re-sync my songs, and it did the same thing. I tried a different computer, as well as a wall-charger I borrowed from a friend, and it happened on all of them. I then tried leaving it plugged in for a bit longer (about 2 minutes), and this time when I unplugged and turned it on, the screen was all messed up (fuzzy and hard to read), but after a few seconds it cleared up. The problem is my IPod is almost out of battery charge, and I can't charge it without burning it up. Can anyone give me any pointers or what I'd need to do to get it fixed, or am I going to need to buy a new IPod? Thanks!