The bass is silent during the intro. It slides in from D12 just before the chorus (The 
yeah! part).

G--------------------------------|
D------------555-3-3/555\--------|
A--------22-2---5---------00\3333|
D-0-044-0------------------------|Chorus


G-------------------------------|
D------------------3-355\-------| Verse
A-5-544-422-2------------00/3333|
D------------5(345)-------------|


G-------------------------------|
D------------------3---5--------|
A-5-544-422-210--11-133-500/3333|  Verse variation
D--------------53---------------|


Then Onto the "I like it..." part
G------------------------------
|

D---------------355553-3-------|
A-------------45------5-543----|
D-5555888855-8-------------5858| Bridge


G------------------------3------|
D---------------355553-35-543---|
A-------------45------5------543|    Bridge variation 1
D-5555888855-8------------------|


G---------------------------------------------------|
D---------------355553-3----------------------------|
A-------------45------5-5-4-3---3333333300000000----|
D-5555888855-8---------------858----------------03h5|  Bridge variation 2


So you play:
D12\....
Chorus 3x
Verse 3x
Verse variation 1x
Chorus 3x
Bridge 3x
Bridge variation 2 1x
Verse 4(!)x
Verse variation 1x
Chorus 3x
Bridge 2x
Bridge variation 1 1x
Bridge variation 2 1x
end on D0

If you have any problems, look up Lithium bass track on youtube. It's a different mix, 
still almost identical.