When I am driving I have this kind of squeaking noise coming from the back. I have a 2000 Integra hatch back. And it sounds like its coming from the hatch. Anyone else ever have this problem and how can I fix it, it’s really annoying.

does it come from under the car or inside?

Well to my best knowledge its coming from inside, but it could be echoing from the outside in.

I know exactly what you are talking about, my car and my GF's old car had the same problem, her's worse than mine. I could never pinpoint the problem, I removed all the plastic, back seats, spare tire etc etc and still it squeeks from time to time. I just turn the radio up and ignor it lol.
Hope you find it and if you do please let me know.