A few amendments to the first version. Have only been playing guitar for 2 and half
so this is basically what I think sounds right to me when I play it to the song.

Capo on 1st fret.

Intro:

C (x32010@1)Am7 (x02010@1)Am7 (x02010@1)Fx2 (133211@1)

C (x32010@1)              G (320003@1)           Am (x02210@1)           F (133211@1)   Today this could be, the greatest day of our lives
C (x32010@1)            G (320003@1)        Am (x02210@1)             F (133211@1)   Before it all ends, before we run out of time


F (133211@1)               AmStay (x02210@1)close to me,
C (x32010@1)               DmStay (xx0231@1)close to me,
            F (133211@1)               AmWatch (x02210@1)the world come alive tonight
C (x32010@1)               DmStay (xx0231@1)close to me


C (x32010@1)                G (320003@1)          Am (x02210@1)             F (133211@1)   Tonight this could be the greatest night of our lives
C (x32010@1)               G (320003@1)           Am (x02210@1)               F (133211@1)   Let's make a new start, the future is ours to find

        Dm (xx0231@1)   AmCan (x02210@1)you see it,
         GCan (320003@1)you see it in my eyes
         Dm (xx0231@1)       AmCan (x02210@1)you feel it now,
         GCan (320003@1)you hold it in your arms

FTonight (133211@1)Am (x02210@1)             CHold (x32010@1)on, Hold on
DmHold (xx0231@1)on, Hold on
FTonight (133211@1)Am (x02210@1)             C (x32010@1)DmHold (xx0231@1)on, Hold on

    F (133211@1)                AmOh (x02210@1)stay close to me (Hold On)
C (x32010@1)              DmStay (xx0231@1)close to me
            F (133211@1)               AmWatch (x02210@1)the world come alive tonight
C (x32010@1)          DmStay (xx0231@1)close me  Ooooh

F (133211@1)                 AmHold (x02210@1)your head high, (Hold On)
C (x32010@1)            DmArms (xx0231@1)open wide
          F (133211@1)                  AmYeah (x02210@1)the world starts to come alive when you
C (x32010@1)              DmStay (xx0231@1)close it me


C (x32010@1)              G (320003@1)         Am (x02210@1)            F (133211@1)   Today this could be the greatest day of our lives
C (x32010@1)              G (320003@1)         Am (x02210@1)            F (133211@1)   Today this could be the greatest day of our lives

F (133211@1)            Am (x02210@1)         COooh, (x32010@1)and the world comes alive
         Dm (xx0231@1)         FAnd (133211@1)the world comes alive
         Am (x02210@1)         CAnd (x32010@1)the world comes alive
   DmOh (xx0231@1)oh oooh

F (133211@1)                        AmStay (x02210@1)close to me (and the world comes alive) hold on
C (x32010@1)                        DmStay (xx0231@1)close to me (and the world comes alive)
            F (133211@1)               AmWatch (x02210@1)the world come alive tonight
C (x32010@1)             DmStay (xx0231@1)close to me (Hold on)

     F (133211@1)                     AmOh (x02210@1)stay close to me and the world comes alive
C (x32010@1)                       DmStay (xx0231@1)close to me and the world comes alive
            F (133211@1)       AmWatch (x02210@1)the world come alive tonight
C (x32010@1)                Dm(stay (xx0231@1)close to me) oh oooh