You need 2 people for this cheat.

Let your friend host a co-op game, then start fuzz.

Fail the activity by killing the camera man and then when it says 'fuzz failed' leave the game & save.

Go back on single player, then load up the game you were just on.

Your top might be wrong, but you can go to 'Impressions'.

Make sure you save it as an outfit! If your friend wants to do this trick as well you should let him.