Pretty simple song, but lots of fun to play!
Worked this out in about half an hour.
Also, I'm not entirely sure that the lyrics there are correct, but they're  
definitely close if incorrect! :)
If there are any problems with this or you have any corrections, let me know in the comments!

--

INTRO, VERSES 1 & 2

C7add4  C  C7add4  C
C7add4  C  C7add4  C
Am(x2) (x02210@1)
CHORUS

F (133211@1)G (320003@1)C(x2) (x32010@1)
VERSE 3

F (133211@1)                         GZombies, (320003@1)if you know what's good for you

     C (x32010@1)              AmJust (x02210@1)turn and stumble away

F (133211@1)          G (320003@1)         C (x32010@1)     E (022100@1)I'll live to fight again another day

F (133211@1)           G (320003@1)               C (x32010@1)              Am (x02210@1)Everyone from Michael J. Fox to Jacob Black would agree

F (133211@1)          G (320003@1)               C (x32010@1)       EIt's (022100@1)incontrovertible fact, so sing with me...


CHORUS x4

End with:

G (320003@1)C (x32010@1)--

Lyrics:


Alright!

Indicate, what did you see?
Was it hordes of inferi?
It's alright, don't be scared now.
You could use a fire to
Hold them back and protect you
If not, I've got your back, always.

And werewolves are better than zombies.
Yeah, werewolves are better than zombies.

Entering the Second War
Voldemort could use them for 
An army of walking undead
I won't let them cause you pain
I won't let them eat your brain
They'd have to get through me first.

Werewolves are better than zombies.
Yeah, werewolves are better than zombies.

Zombies, if you know what's good for you
Just turn and stumble away
I'll live to fight again another day
Everyone from Michael J. Fox to Jacob Black would agree
It's uncontrovertible fact, so sing with me...

Werewolves are better than zombies.
Yeah, werewolves are better than zombies. (x4)