Focus on the strumming more than the timing, I'd say. The timing will come once 
you've got the strum down and, until then, whenever you play it, just say you've 
got punk spirit and you don't need to follow anybody's timing. I don't focus on 
it too much with this song, so the chord placements might not be wholly accurate, 
but they'll give you a good idea.

Playing along with the recording (or the video below) will help a lot.

Tuning: Standard
Capo: None
Video: Here's a video of Amy playing this song acoustically. Should be a godsend, 
if you're having trouble with timing. http://www.youtube.com/watch?v=JdSBuG1C4Hk

Verse chords:
A: 577655
B: 799877
D: 022100 (0=10th, 2=12th, 1=11th)

Chorus chords:
A: 577655
D: x57775
E: x79997

Intro: A B D A (x2)

See that (A)girl over (B)there she's gonna (D)give me the (A)cold shoulder (A B D A)
She may be (A)straight to(B)night but last (D)night she (A)let me hold (A)her (B D A)
It took A (A)little bit of (B)faith and A (D)lot of (A)patience (A B D A)
I got (A)all night (B)long and (D)no reser(A)vations (A B D A)

(A)Oh (D)yeah (E)al(D A)right

The (A)Alabama (B)kids are coming (D)over to(A)night (A B D A)
They're gonna (A)drive into (B)Georgia and (D)rock us (A)right (A B D A)
They say the (A)ring in the tree shows A (D)long line of (A)passion (B D A)
From the (A)cotton (B)fields to the (D)emanci(A)pation (A B D A)

(A)Oh (D)yeah (E)al(D A)right
(A)Baby are you gonna, (D)baby are you gonna
(E)Baby, are you gonna (D)treat me (A)right?

(A B D A)

I hang with the (A)devi(B)ants and the (D)tranny (A)nation (A B D A)
They don't (A)take the (B)names their (D)mama gave (A)em (A B D A)
They've been (A)so fucked with they've got (D)nothing to (A)lose (B D A)
They taught me (A)one cool (B)thing I (D)don't have to (A)choose (A B D A)

(A)Oh (D)yeah (E)al(D A)right
(A)Baby are you gonna, (D)baby are you gonna
(E)Baby, are you gonna (D)treat me (A)right?

My (A)heart's balled (B)up and I'm (D)ready to (A)explode (A B D A)
Girl we can (A)light up the (B)night like A (D)firework (A)show (A B D A)
Put your (A)back against the speaker and (D)feel it (A)rumble (B D A)
Put your (A)faith in (B)me don't (D)give me that (A)cold shoul(A)der (B D A)

(A)Oh (D)yeah (E)al(D A)right
(A)Baby are you gonna, (D)baby are you gonna
(E)Baby, are you gonna (D)treat me (A)right?