It starts out with drums and bass. Then the guitar enters with (all power chords):
D5 B5 F5 C5 C5 C#5 (repeat 4 times)
Then the verses come, mostly drums and bass, but during "I don't know why!" Kurt plays:
E)-------------------------- B)-------------------------- G)-----4/5-5-5-5(bend)-5---- D)-------------------------- A)-------------------------- E)--------------------------
For the chorus its just the intro over and over again.
Bridge:
D5 F5
At the end of the bridge, during the "I don't know why" instead of the normal thing, he plays:
E)-------------------------- B)-------------------------- G)-----3--3--3--3(bend)--3-- D)-------------------------- A)-------------------------- E)--------------------------
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