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.
1) A shovel. You can swing it, you can stab with it, and you can use it to behead a motherfucker. Plus they won't get stuck on it, and crawl up to get you.
2) "Surprise! You're Dead!" by Faith No More. Or alternately, the obvious song by my celebrity.
3) Micheal Jackson for his ability to cast a unique Control Undead spell. Also, if he gets eaten, I could give a shit.