Sorry if this tab isn't very accurate, its my first tab on guitar and I've just started playing.
I just updated it as well, so hopefully it will be better now :)

Intro
If you want to play chords, this fits.
e|---------------|
B|---------------|
G|-----11-999999-|
D|9999-11-999999-|
A|9999-9--777777-|
E|7777-----------|X3

e|-----------|
B|-----------|
G|-----------|
D|6666-77777-|
A|6666-77777-|
E|4444-55555-|x1

Theres also the riff that is played
e|------------------|
B|------------------|
G|------------------|
D|------4---22-22-22|
A|--2-----2------2--|
E|0---00------------|X3

e|----------------|
B|----------------|
G|----------------|
D|----------------|
A|-----6----------|
E|4-4-4-4-5-5-55-5|x1


Verse 1 x2
Same chords as Intro

Keyboard Riff
e|--------4-4-4-7----------4-4-4-7---------|
B|(5)-(7)---------5-5-55-7---------5-5-55-7|
G|-----------------------------------------|
D|-----------------------------------------|
A|-----------------------------------------|
E|-----------------------------------------|
Only play the notes in the brackets on the first time

Then there is no guitar until the Outro, come in on "Keep your head" the 4th time Katie sings it.
e|--------------|
B|--------------|
G|--------------|
D|--------------|
A|--------------|
E|000-44-55-55-5|
Till the end.

If you want to play chords, play these ones.
e|-----------|
B|-----------|
G|-----------|
D|222-6-77777|
A|222-6-77777|
E|000-4-55555|
Play these until the end of the song.

Thats all. Please rate and comment