K-pop Lyrics

Is you is or is you ain't my baby?
Well the way you're acting lately
Well it makes me doubt
You were still my baby baby
But it seems like my flame in your heart
Well it's just gone out
A man is a creature
That has always been strange
Just when you're sure of one
You'll find that he's gone
And made a change
Is you is or is you ain't my baby?
Well maybe my baby found
Somebody new
Or is my baby still my baby too?