I am in my second playthrough and i got stuck in the loading screen after beat Craig. I reload and i got stuck again. In my first playthrough i didn't have problems but i wasn't wearing David  Hassenhof head. I am equipped with David head, the girls outfit and the aids to get the achievements in the final fight but i cannot progress in the game.

Who are you using as your ally? I was having the same problem. Had Kyle as my ally, switched mid battle to butters and it worked

Just switching your buddy in general should fix this issue, it doesn't have to be in battle.  You can swap back to your original buddy after you've switched him out once.