This is an funny song and I`am sure it is correct just play it and you will see.
Put youre bass in normal tuning —> G D A E
Then play this:

After you played the intro/ Verse one time, you must play these notes:
(8) (6) This is also afther the chorus.

Intro/ verse
g ——————————(8)——(6)———————————————————4———4———4———|
d —7777766666—4444——666677776666444222———2———22——2—|
a —————————————————————————————————————————————————|
e —————————————————————————————————————————————————|

Chorus
g ————————————————————|——————————————————————————|———————|
d 7777776667777779997—|———————767676——————767676—|———————|
a ————————————————————|—7——7—————————7——7————————|——7——7—|
e ————————————————————|——————————————————————————|———————|

That`s it you have to figure out by youre self when you have to play them.