Intro (just right after the small guitar bit)
G---------------------------------------------------
D---------------------------------------------------
A222222222222---------------------------------------
E-------------444444444444-000000000000-222222222222
Verse
Gb-----------------------------
Db-----------------------------
Ab22222222222222---------------
Eb--------------2222222-0000000
Chourus
Gb----------------------------
Db--------------2222222-------
Ab44444444444444-------2222222
Eb----------------------------
Verse
Gb-----------------------------
Db-----------------------------
Ab22222222222222---------------
Eb--------------2222222-0000000
Chourus
Gb----------------------------
Db--------------2222222-------
Ab44444444444444-------2222222
Eb----------------------------
[ Tab from: https://www.guitartabs.cc/tabs/g/gob/what_to_do_btab_ver_3.html ]
The na na na na na na part
Gb----------------------------------
Db--------------2222222-------------
Ab44444444444444-------222----------
Eb------------------------2222222222
Guitar solo
Gb--------------------------------
Db--------------------------------
Ab22---22-------------------------
Eb-------44---44-22---22-00-000000
Gb----------------------------------
Db--------------2222222-------------
Ab44444444444444-------222----------
Eb------------------------2222222222
Gb----------------------------------
Db--------------2222222-------------
Ab44444444444444-------222----------
Eb------------------------2222222222
Chourus
Gb----------------------------
Db--------------2222222-------
Ab44444444444444-------2222222
Eb----------------------------
And just play that for the rest of the song, it's realy easy