Ripped from clearbell. 

You are in a mall when the zombies attack. You have:
1. one weapon.
2. one song blasting on the speakers.
3. one famous person to fight alongside you.

Weapon can be real or fictional, you may assume endless ammo if applicable. Person can be real or fictional.

1. A lightsaber.
2. Dragula by Rob Zombie...excellent fight song.
3. The Tenth Doctor...because he has hundreds of years experience battling aliens, and zombies can't be that different. Plus, if we need to escape, we can just hop in the TARDIS.