Well I logged in like any other time as usually, and I found myself wearing a DJbes head. I don't think I was hacked or anything since none of my TC or items had been stolen. So is there an explanation for this?

What client version are you using?

Also try to download yourself then /lp.

But his head texture was loaded on my textures. So someone must have uploaded it.

Hmm I suggest modifying your password imediately.

Also modify your email too, and check if you got everything there in your inventory.