[Verse 1: Willie Nelson]
What is this thing called love?
This funny thing called love?
Who can solve its mystery?
Why should it make a fool of me?

[Verse 2: Norah Jones & Willie Nelson]
I saw you there one wonderful day
You took my heart and threw it away
That's why I ask the Lord up in Heaven above
What is this thing called love?

[Verse 3: Norah Jones & Willie Nelson]
I saw you there one wonderful day
You took my heart and threw it away
That's why I ask the Lord in Heaven above
Just what is this thing called love?