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: I can haz powered armor plz? :) I'm not sure if it counts as a weapon of not and it would definitely be overkill, but that's my first choice. I'd just need to make sure that it was a space-ready version or make sure to keep the air vents clear of liquefied zombie :) Well my _real_ first choice would be powered armor and a plasma cannon, but that would almost certainly count as two weapons :) If powered armor is disallowed however i'd go with a plasma rifle. (Plasma canons are a little too unwieldy to use if you don't have enhanced strength and you need to be prepared to get attacked from any angle.)
3: This one is tougher. If i wanted to do the best to guarantee my chances of surviving i'd probably pick Peter Petrelli (_after_ most of the events in the second season where he's got most of those important issues under control, or perhaps even the future version of him.) However i think i'd probably be safe enough with powered armor that i could afford to pick someone more... interesting. (Are zombie movies one of those genres where the survivors almost inevitably end up sleeping together? O=) I'd be tempted by Kaylee (so to speak) but she's not much use in a fight by herself, and although she could be of great help if the fight took place on a spaceship the only way i can imagine her really helping in the described situation would be if the powered armor broke down and i needed a repair, but that would probably be outside her field of expertise. Advent Children Tifa would certainly be useful (or Paine, or Etna =) but i think in this situation i'd probably go with Honor Harrington. She's strong (she's from a high-G world after all) and tough and can kick ass and take names, nothing ever seems faze her (at least in terms of combat) so she could probably handle zombies, and of course she's cute :) Also, being from a SF world rather than a fantasy one she wouldn't look down on me for not having innate super-human combat abilities and having to rely on powered armor instead, in fact she'd probably want a suit for herself.
Oh yeah, and with her i might get a free telepathic (and lethal) alien cat to help out in the bargain. Yay Nimitz! :)
2: This was actually the hard one. I compiled a list of about 100 songs that sounded at least vaguely combaty to me, but in the end, although i know it would lose me some (ie a lot of) coolness points, the one that i could most imagine myself fighting zombies to was the version of the "Hampster Dance" song from the "Mascot Dance" AMV :)
If the goal is supposed to be looking and sounding cool rather than personal motivation to kill zombies, well, i'd probably try to narrow down the following long list of songs a bit futher and pick one:
Fatboy Slim - "Weapon of Choice" (for obvious reasons =)
Poe - Walk The Walk
Garbage - Push It
Within Temptation - Stand My Ground
Evanescence - Bring Me To Life
Collective Soul - Heavy
Jack Off Fill - When I Am Queen
Slick Idiot - Xcess (Remixed By Schneider Of Rammstein)
Fire Bomber - Planet Dance
N.E.R.D. - Rock Star (Jason Nevins Remix Edit)
Mindless Self Indulgence - Shut Me Up
Nickelback - Animals, Figured You Out, Yanking Out My Heart (the first two both leave a _lot_ to be desired in terms of lyrics, but the music is a good fit)
Stabbing Westward - Save Yourself
Linkin Park - One Step Closer
Offspring - Defy You
Rob Zombie - More Human Than Human (Techno Remix), Never Gonna Stop
Jonathan Coulton - The Big Boom
Tom Smith - Rocket Ride
FF Advent Children - Those Who Fight Further,
Black Mages - Clash on the Big Bridge, The Decisive Battle, Those Who Fight Further, Maybe I'm a Lion,
FF6: Gaffeizil - Cid in the Factory, Beatdrop - Deserted Industry
FF7: Standby - Galvanized Boss
FF8: Standby - Desperados, mp - Liberi Fatali Overhaul, Orkybasg - Perdition Hardcore
Mazedude - River City Rammstein
Mellogear - Red Alert HellMarch (Red Scare)
Jivemaster - Einhander Waztelands
Also, if it were some kind of Mad Maxesque barbarians then Emerald Rose's "Johnnie Cope" or Heather Alexander's "Battle for Mosque Al' Amu" or "March of Cambreadth" would work too, but they don't go so well with mindless and effectively passionless zombies.
I'm sure there's some heavy metal rock type songs that would work better than all of the above, but those don't tend to be the kind of songs i keep in my usual playlists, so i can't think of what they might be right now.
Oh, and before failing to find any good "Re: Your Brains" images to retool as an icon and making up my own, i stumbled across this Re: Your Brains music video from DragonCon last year that i'd completely forgotten about. It's pretty awesome :)