Nick: He refuses to dress up for Halloween, so same as last year he wore a shirt Joe got him that says "I have no costume but I have my dignity":
Joe: James Franco from Spring Breakers
Kevin: a dude passing out Halloween candy at home
Source 1 Source 2, Source 3, Source 4
In some of the other posts there were comments on how they hadn't posted anything to their fans, so I thought I'd post this.