Surprisingly there are no bass tabs for this song.  Probably because it is so easy.

Standard tuning: E A D G

Bass comes in after the guitar intro into the verse:
Repeat a 4x
----------------------------------------|
----------------------------------------|
----------5555-5555-0000-0000-----------|
0000-0000-------------------- 0000-0000-|

Chorus: (I tired to show the different timing of the chorus, but basically just listen 
for the switches and play each note to the words; when he extends a lyric just keep 
playing the same note in tempo)
 "when the walls came dooown"  "all the way to heeell"
  7-   7-  7-    7-   7777770   5-  5-  5-  5- 555555


Hope that makes sense.
-----------------------------------------------------0-------|
----------------------------------------------------0-202----|
777-7-7-777-7-7777-05555-5-55-55555-0000-00--------2-----00--|
-------------------------------------------00000-----------3-|

You'll have to learn the song structure as each Chorus is a little different at the end, 
before it goes back to the verse. But the little riff at the end is:
----0-------|
---0-202----|
--2-----00--|
----------3-|

That's it that's all!  Great song, east to play and perfect song to warm up with!

If anyone needs further elaboration I can post a you tube vid if requested.