I would recommend to play it using picking pattern: T i m i r i m i
The G chord played at the end of each verse is one beat long a single down strum will do.


Intro C   G  Am    F  G  Dm  Am  G

C                G                        Am
  Let's start in style, let's dance for a while
           F                             G
Heaven can wait we're only watching the skies
                Dm                     F
Hoping for the best, but expecting the worst
                      Am        G  C
Are you gonna drop the bomb or not?

C             G                      Am
  Let us stay young or let us live forever
                  F                       G
We don't have the power, but we never say never
               Dm                       F
Sitting in the sandpit, life is a short trip
                Am    G - C
The music's for the sadman

C           G                         Am
   Can you imagine when this race is won
                 F               G
Turn out all the faces into the sun
              Dm                        F
Praising our leaders, we're getting in tune
                     Am        G - C
The music's played by the madman

Chorus:
C           G
   Forever Young
          Am         F
I want to be Forever Young
G                       Dm
 Do you really want to live forever?
  F        G
 Forever,  and ever
C           G
   Forever Young,
          Am          F
I want to be Forever Young
G                             Dm
   Do you really want to live forever?
 F  G         C   G F G
     Forever Young.



C               G                       Am
 Some are like water, some are like the heat
           F                       G
Some are a melody and some are the beat
          Dm                     F
Sooner or later they all will be gone
          Am             G- C
Why don't they stay young?

C                    G              Am
  It's so hard to get old without a cause
               F                      G
I don't want to perish like a fading horse
            Dm              F
Years like diamonds in the sun
              A      G- C
And diamonds are forever

C            G                 Am
  So many advantages given up today
         F                 G
So many songs we forgot to play
               Dm                   F
So many dreams swinging out of the blue
          Am    G - C
Oh let it come true

Chorus...

Solo...

Chorus...