(Props to optional_joy who corrected these tabs!)

Tuning:
e
B
D (tune G down to D)
D
G (tune A down to G)
E

Intro:
e|--------------------------------|
B|--------------------------------|
D|---0-----2-----2---0-----2------|
D|-----4-----4---------4-----4----| repeat x2
G|-4-----4-----4---4-----4-----4--|
E|--------------------------------|

(When I was eight, I was sure...)
           x4                               x2
e|---------|--------------------------------|
B|---------|--------------------------------|
D|---------|---0-----2-----2---0-----2------|
D|---0---0-|-----4-----4---------4-----4----| repeat all x2
G|-0---0---|-4-----4-----4---4-----4-----4--|
E|---------|--------------------------------|

(Oh, Oh, Sugar spell it out like...)
e|-----------------|
B|-----------------|
D|-----------------|
D|---4---4---4---4-| repeat x6
G|-4---4---0---0---|
E|-----------------|

(Oh, like O, Like H in your gut...)
e|-------------------|------------------|
B|-------------------|------------------|
D|-------------------|------------------|
D|-12-----12-9-----9-|---4---7---2---2--| x4
G|----0-0------0-0---|-4---7---2---2----|
E|-------------------|------------------|

(...In your gut)
e|--------------------|
B|--------------------|
D|--------------------|
D|--12-----12-9-----9-| x4
G|-----0-0------0-0---|
E|--------------------|