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 (x32010@1)name="chord_320003@1">G C (x32010@1)name="chord_133211@1">F C (x32010@1)name="chord_320003@1">G Am (x02210@1)name="chord_133211@1">F
CCheer (x32010@1)up!
              G (320003@1)                              C (x32010@1)               F'Cause (133211@1)nothing really matters when you look up into outer space
              C (x32010@1)                   G (320003@1)         Am (x02210@1)           FIt's (133211@1)a great big world, and there's no need to cry

CCheer (x32010@1)up!
              G (320003@1)                       C (x32010@1)               FWe're (133211@1)all interconnected to the reaches of the galaxy
       C (x32010@1)                   G (320003@1)         Am (x02210@1)           FAnd (133211@1)my best friend says he came from the sky

GHe (320003@1)traveled to the Earth aboard a pink space ship
GIt's (320003@1)hard for him to hide behind those eyes...

CCheer (x32010@1)up!
          G (320003@1)                       C (x32010@1)               FThe (133211@1)atoms in your body are as old as every dinosaur
             C (x32010@1)            G (320003@1)         Am (x02210@1)           FYou're (133211@1)a special part of one big grand design

CCheer (x32010@1)up!
            G (320003@1)                            C (x32010@1)               FWe're (133211@1)all in this together to discover what we're living for
 C (x32010@1)               G (320003@1)               Am (x02210@1)           F13 (133211@1)billion years, and there's still time

GEvery (320003@1)night, I wish upon a star so bright
GWaiting (320003@1)for the others to arrive

CCheer (x32010@1)up!
               G (320003@1)                             C (x32010@1)               F'Cause (133211@1)nothing really matters when you look up into outer space
            C (x32010@1)                      G (320003@1)         Am (x02210@1)           FIt's (133211@1)a great big world, and there's no need to cry
 C (x32010@1)               G (320003@1)               Am (x02210@1)           F (133211@1)             C13 (x32010@1)billion years, and there's still time...
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