If only this would actually happen

A meme from Gwyn.

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.

Right, okay.

1) The OCD flash grenade. Zombies have a pretty shambling pace anyway-- it would take them that much longer to get to me if they have to touch each wall three times or avoid cracks in the floor.

2) "Sinner Man" Nina Simone

3) Avner from Munich. It would make things pretty angsty, but those zombies would be obliterated.

K.