Use the "normal chords" on verse and bridge. When the chorus breaks, use the open chords 
pointed out below.

Standard tuning


Verse:

C#    B    E    A

Bridge:

C#    B    E    A

Chorus:

C#    B    E    A


Open Chords used:

C#    -     [x 4 6 6 5 0]

B     -     [0 9 9 8 0 0]

E     -     [0 7 9 9 0 0]

A     -     [0 7 7 6 0 0]