Strange Noises at Speed

[cornontherob]

Just got the wheels off a couple days ago. What I found was kind of unnerving. The CV axles are fine, no tearing or anything on the boots. The problem was in the lug bolts. Somehow, only on the right rear wheel, all of them were loose. I know for a fact that I tightened them to spec with all the other wheels a month ago when I had the car up on jacks. So either they're coming undone on their own, or something else.