How to Get the Killing 'Em Swiftly achievement in L4D 2's DLC

It's time to lock and load, achievement hunters! This tutorial is on the popular zombie shooter, Left 4 Dead 2. This takes place in their DLC, The Passing. The achievement is called Killing 'Em Swiftly and it requires you to find a jukebox and find a new song to play. It's an easy 20 gamer points to add to your gamerscore. So check it out and good luck!