Luv this song, luv the show :) Enjoy!

G                C
hum hum hum hum hum
              G
hum hum hum hum
             D   G
hum hum hum hum hum

Verse 1:
G                 C                  G
Sometimes in our lives, we all have pain
            D    C
we all have sorrow. 
G                C                     G
but, if we are wise, we know that there's
       D      C
always tomorrow

Chorus:
        G
Lean on me
                C
when your not strong
                   G
and i'll be your friend
               D     C
i'll help you carry on
G                  C                   G
for, it won't be long, till i'm gonna need
            D     C
somebody to lean on.

Play same chords :)