Find names of these 2 zombie movies by description
First, in a relaxed mood, the survivors are having fun by shooting zombies from roofs. One of them describes a zombie and asks another survivor on top of another building to shoot it. I think he says something like "shoot the one that looks like [some famous actor which I forgot]" and he shoots and they laugh together. The movie is thrill and action but this scene was funny.
Second, two zombies escape from experimentation and become rock stars. It was a funny and old movie. I searched for it and the results were not what I was looking. So any ideas?