Oh no, it's not just a small squeak its REALLY loud.
Anyways, as was suggested, I tried lighty sanding the rims and the brake pads, plus I toed in the brakes. The sound went down a little bit, but its still lound and clear. What else might the problem be? My bike was kept outside for a few years, and I haven't changed the brake pads since then. Is that probably something I should have done already?