[INTRO: ]

(just bass notes) 
G#      A       A#      B


VERSE/CHORUS (the chords never change from here on out) 

Amaj7/B          Adim/G#      C#7      F#7 
-------------------------------- 

And that's it. 

NOTES 
For that C#7 chord (on the piano) I always use  
the 3rd inversion which would be (from bottom note to top) 

G# 
B 
C# 
E 


Good luck!