[Chorus: Britney Spears & Lucas Secon]
Must be a reason why I'm king of my castle (Oh)
Must be a reason why I'm free in my trapped soul (And I)
Must be a reason why I'm king of my castle (Oh)
Must be a reason why I'm making examples of you

[Verse 1: Lucas Secon & Britney Spears]
It started in my mind
Not limited by where I'm at in my life
Only I can ever change it up
Kinda stuck but I made my luck (Of you)
And I know I gotta take control
I don't wanna ever lean on you
You're defined by what you own
But my soul is rich on its own
I don't ever wanna bow down a lot
All I wanna do is call the shot (Oh)
Ain't nobody got me on speed dial
In my head, I'm ahead by a mile (Of you)
Moving on to bigger, better things
In my brain, I'm the only king (Oh)
Don't need you
That's how I get through

[Chorus: Britney Spears & Lucas Secon]
(Oh) Must be a reason why I'm king of my castle (Oh)
Must be a reason why I'm free In my trapped soul (And I)
Must be a reason why I'm king of my castle (Oh)
Must be a reason why I'm making examples of you
Of you, of you, of you, of you
[Verse 2: Lucas Secon & Britney Spears]
Independent song
Only I can ever right my wrong (Oh)
I don't jump when you hit the gong
And in my mind, I design how long (Ooh)
Don't you start thinking I'm working for you?
Deep in my heart, yo, I do what I do (Oh)
Gotta 'cause I gotta eat when I'm free
Feeling the heat underneath my feet
Moving on to bigger, better things
In my brain I'm the only king (Oh)
Don't need you
That's how I get through

[Chorus: Britney Spears & Lucas Secon]
(Oh) Must be a reason why I'm king of my castle (Oh)
Must be a reason why I'm free In my trapped soul (And I)
Must be a reason why I'm king of my castle (Oh)
Must be a reason why I'm making examples of you

[Bridge: Britney Spears & Lucas Secon]
Must be the reason
Why I'm king of
Must be the reason
Why I'm king of (Let's go, let's go)
Ooh, I want that soul control (It's mine)
Ooh, I want that soul control
Ooh, I want that soul control (Let's go, Let's go)
Ooh, I want that
Ooh, I want that
Soul
[Chorus: Britney Spears & Lucas Secon]
(Oh) Must be a reason why I'm king of my castle (Oh)
Must be a reason why I'm free In my trapped soul (And I)
Must be a reason why I'm king of my castle (Oh)
Must be a reason why I'm making examples of you
Must be a reason why I'm king of my castle (Oh)
Must be a reason why I'm free in my trapped soul (And I)
Must be a reason why I'm king of my castle (Oh)
Must be reason why I'm making examples of you
Of you, of you, of you, of you (Let's go)
Of you, of you, of you, of you