Song: Goodbye So Soon
Artist: Vincent Price
Composer: Henry Mancini
Soundtrack: Basil The Great Mouse Detective

Recently, I had a view of the cartoon and looked at a tab, but I think the song 
uses the key as demonstrated;

C (x32010@1)   
   Goodbye so soon
       F (133211@1)  Fm (133111@1)  C (x32010@1)   And isn't this a crime?
      F (133211@1)    Bb7 (x13131@1)    C (x32010@1)       A7 (x02020@1)   D7 (xx0212@1)  We know by now that time knows how to fly 
   G7 (320001@1)         C (x32010@1)
   So here's goodbye so soon
          F (133211@1)      Fm (133111@1)    C (x32010@1)  You'll find your separate way
        F (133211@1)    Fm (133111@1)      C/E (x3111x@5) A7 (x02020@1)  With time so short I'll say so long
       D7 (xx0212@1)  And go
      G7 (320001@1)  So soon
       C (x32010@1)  Goodbye

D9
   You followed me, I followed you
           Dm (xx0231@1)              Fm (133111@1)         C (x32010@1)  We were like each other's shadows for a while
                   E7 (020130@1)         Am (x02210@1)   Now as you see, this game is through  
        D9                           Dm (xx0231@1)  So although it hurts, I'll try to smile

Em G7
   As I say

C (x32010@1)   
   Goodbye so soon
       F (133211@1)  Fm (133111@1)  C (x32010@1)   And isn't this a crime?
      F (133211@1)    Bb7 (x13131@1)    C (x32010@1)       A7 (x02020@1)   D7 (xx0212@1)  We know by now that time knows how to fly 
   G7 (320001@1)         C (x32010@1)
   So here's goodbye so soon
          F (133211@1)      Fm (133111@1)    C (x32010@1)  You'll find your separate way
        F (133211@1)    Fm (133111@1)      C/E (x3111x@5) A7 (x02020@1)  With time so short I'll say so long
       D7 (xx0212@1)  And go
      G7 (320001@1)  So soon
       C (x32010@1)  Goodbye