"Unthinkable"是由Alicia Keys演唱的一首歌曲，以下是其歌詞：
Verse 1:
I can't believe what I'm about to do
I'm turning my back on you
I'm running out the door
Chorus:
It's unthinkable, unimaginable
I never thought I'd feel this way
It's unbelievable, I can't believe it
I'm walking out on us
Verse 2:
I know it's wrong to walk away
But I don't think I can stay
The thought of being here anymore
Is making me feel so small
Bridge:
I'm trying to find the words to say goodbye
But every time I start to speak
The words won't come out right
Chorus:
It's unthinkable, unimaginable
I never thought I'd feel this way
It's unbelievable, I can't believe it
I'm walking out on us
Outro:
It's been said and done
The easy way it had to end it
But I can't be the one to blame
For us letting go of everything we had together.