Well, I was close to what I said on Monday.
#19: Kiss Kiss Bang Bang
Like Shaun of the Dead, this is a genre movie with a comedy twist. And it focuses on two guys with a girl. And there are dead people, but they aren't zombies. The genre this time is noir with a little bit of the buddy cop dynamics thrown in for good measure.
Harry (Robert Downey Jr.) is a crook who is mistaken for an actor. He teams up with P.I. Gay Perry (Val Kilmer) to learn the ways of the detective. Of course they get wrapped up in a twisting murder plot.
Most importantly, this movie is hilarious. With dialogue like
Perry: Merry Christmas, sorry I fucked you over.
Harry: No problem. Don't quit your gay job.
and...
Perry: Did your dad love you?
Harry: Only when I dressed up like a beer bottle, how about you?
Perry: Well, he used to beat me in Morse code, so it's possible, but he never said the words.
you can't go wrong. You must watch this movie as soon as you possibly can. Here's a scene because the trailer sucks.