Colin Farrell and Gerard Butler both spent the last few days hard at work on new movies. Gerard was in Michigan this morning on the set of Machine Gun Preacher, sporting a leather vest and a slicked-back mullet. Colin, meanwhile, showed off his fake comb-over Friday on the LA set of Horrible Bosses. Neither actor looked their hottest, but fortunately, they're just in costume. Tell us whose make-under you think is more dramatic — Colin's or Gerard's?