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Chord diagram for C
Chord diagram for G
Chord diagram for F
Chord diagram for Am
      This Isn't in the correct key, but what I like to play it in. Transposing the key 
down 4 half steps (so the first chord is Ab) should put it in the original key

Intro-
C G C F C G Am F
C
Cheer up!
              G                                C                 F
'Cause nothing really matters when you look up into outer space
              C                     G           Am             F
It's a great big world, and there's no need to cry

C
Cheer up!
              G                         C                 F
We're all interconnected to the reaches of the galaxy
       C                     G           Am             F
And my best friend says he came from the sky

G
He traveled to the Earth aboard a pink space ship
G
It's hard for him to hide behind those eyes...

C
Cheer up!
          G                         C                 F
The atoms in your body are as old as every dinosaur
             C              G           Am             F
You're a special part of one big grand design

C
Cheer up!
            G                              C                 F
We're all in this together to discover what we're living for
 C                 G                 Am             F
13 billion years, and there's still time

G
Every night, I wish upon a star so bright
G
Waiting for the others to arrive

C
Cheer up!
               G                               C                 F
'Cause nothing really matters when you look up into outer space
            C                        G           Am             F
It's a great big world, and there's no need to cry
 C                 G                 Am             F               C
13 billion years, and there's still time...
    

Source: https://tabs.ultimate-guitar.com/tab/ian_axel/cheer_up_chords_1168878

More songs by Ian Axel