Hey guys this is my first tab so be easy on me, I tabbed this by ear so if there are any 
or errors feel free to point them out. ENJOY!
The strum pattern for the power chords is pretty simple, just listen to get it.

Intro:
E ---------------------------------------|
B ---3----3----1----0--------------------|
G --0----2----2----2----X2---------------|
D -2----2----2----1----------------------|
A ---------------------------------------|
E ---------------------------------------|

Verse 1:
E ------------------------------------------------|
B ---3---3---1---0--------------------------------|
G --0---2---2---2--X2-Then--5-7-------------------|
D -2---2---2---1------------3-7-5-4-2-7-9---------|(listen for timing)
A --------------------------3-5-5-4-2-7-9---------| real simple
E ------------------------------3-2-0-5-7---------|

Verse 2:
E --------10--------------------------------------|
B -8-8-8-8--8-8-8-8-12-8-8-8-8-10-7-7-7-7---------| X2
G --9-9-9----9-9-9------9-9-9------9-9-9-9--------|
D ------------------------------------------------|
A ------------------------------------------------|
E ------------------------------------------------|
Verse 2 (cont'd)...did you know...
E ----------------------------------|
B ----------------------------------|
G -5-7------------------------------|
D -5-7-5-4-2-7-9--------------------|(listen for timing again)
A -3-5-5-4-2-7-9--------------------|
E -----3-2-0-5-7--------------------|

Pre-bridge (just repeat intro one time)

Bridge
E ---------------------------------------------|
B ---------------------------------------------|
G -5-7-------5-7-------------------------------|
D -5-7-5-4-2-5-7-7-9---------------------------|
A -3-5-5-4-2-3-5-7-9---------------------------|
E -----3-2-0-----5-7---------------------------|

Verse 3
E --------10--------------------------------------|
B -8-8-8-8--8-8-8-8-12-8-8-8-8-10-7-7-7-7---------| X2
G --9-9-9----9-9-9------9-9-9------9-9-9-9--------|
D ------------------------------------------------|
A ------------------------------------------------|
E ------------------------------------------------|

Verse 3 (cont'd)...did you know...
E ----------------------------------|
B ----------------------------------|
G -5-7------------------------------|
D -5-7-5-4-2-7-9--------------------|(listen for timing again)
A -3-5-5-4-2-7-9--------------------|
E -----3-2-0-5-7--------------------|

Verse 4
E -------------------------------------|
B -------------------------------------|
G -5-7-----------4---------------------|
D -5-7-5-4-2-7-2-4-2~------------------|(listen for timing again)
A -3-5-5-4-2-7-2-2-2~------------------|
E -----3-2-0-5-0---0~------------------|

And that's basically it.