I DON'T KNOW WHY

                              
Key of Bb     4/4      


[   Bb          |  Gm7      |  Dm7  Dbdim |  Cm7   F7  |
                             
|   Cm7         |  F7       |  Cm7   F7   |  Bb        |
                                
|   Bb Ab7 G7 / |  C7    F7 |  Bb     C7  |  Cm7   F7  | 

|   Bb          |  Dm7   G7 |  Cm7    F7  |  Bb        |