Verified answer

Nope it won't work because of 2 things-

1) iPod 4g got a camera in back and front and its much thinner than 1g

2) the power on/off button is on the other side of the iPod 4g.

So if you get the 4g cover u wont be able to use that.

Simple.

You didn't specify whether its a touch or a nano, but either way the answer is no. Apple products get thinner as they go along.