《One Thing》的詞曲創作人包括Alicia Keys和Bryson Tiller，以下是這首歌的部分歌詞：
女：
Baby come over here I'm waitin on you
Got my mind set on what I'm gonna do
Can't tell me nothin I won't do for you
One thing that I know for sure
男：
Come on girl, yeah
女：
You're my everything
Boy you got it
And I ain't even gotta say a thing
I just want to be
One thing in this world for you
男：
Girl you're the only one that I need
Girl you know that it's true
I ain't even gotta say a thing
'Cause you already know
女：
One thing
男：
One thing baby
One thing, one thing baby
Girl you're my everything
Girl you're my everything
Girl you know that it's true
Yeah yeah yeah yeah
男：
And I ain't even gotta say a thing
I just want to be
One thing in this world for you
Yeah yeah yeah yeah yeah yeah yeah yeah
女：
You're my everything, boy you got it right
And I ain't even gotta say a thing
I just want to be your everything, yeah yeah yeah yeah
One thing baby, one thing baby, yeah yeah yeah yeah yeah yeah yeah yeah
以上是部分歌詞，請注意，歌詞可能隨時間變化，可以參考Alicia Keys的官方音樂平台獲取最準確的信息。