I figured this song out by ear, I think it's right. feel free to comment (and/or) 
give suggestions lol

         Bm  
I've got sunshine on a cloudy day,
           C
I've got a lovely little lamb inside my brain.  
      B7                   
I got you and me that's a family.
     E
Lets sail the seven seas and see what we sea
      Bm
Cause life is silly if you see like me,
          C 
So please don't take life so seriously
         B7              
I've got you and me that's a family
     E                  
Lets sail the seven seas and see what we
Am E C7 F E
Ahh, ahh, ahh.
      Bm
Cause life is so hard to explain,
      C          
I got chemical swirls in my brain.
      B7  
I got you and me that's a family.
     E
Lets sail the seven seas and see what we sea
      Bm
Cause life is silly if you see like me,
        C 
So lets play pretend and make believe
      B7                      
I got you and me that's a family
     E
Lets sail the seven seas and see what we
Am E C7 F E
Ahh, ahh, ahhh.
Am E C7 F E
Ahh, ahh, ahhh.
      Am
Cause life is just a melody
                                  E
So why don't all the pissy people go ahead and sing it with me

Everybody sing it with me
C7
Life is just a melody
                                  F                             E
So why don't all the pissy people go ahead and sing it with me, yeah

(Repeat same progression untill the end of the song)

Cause life is just a melody
So why don't all the pissy people go ahead and sing it with me
Everybody sing it with me
Life is just a melody
So why don't all the pissy people go ahead and sing it with me, yeah

Cause life is just a melody
So why don't all the pissy people go ahead and sing it with me
Everybody sing it with me
Life is just a melody
So why don't all the pissy people go ahead and sing it with me, yeah

Cause life is just a melody
So why don't all the pissy people go ahead and sing it with me
Everybody sing it with me
Life is just a melody
So why don't all the pissy people go ahead and sing it with me, yeah

I hope this helps