[Verse 1: Britney Spears]
I've been thinking, just sitting thinking
On why I love you and all the reasons
And if I lost you, boy, if I lost you
I'd lose myself, and I wouldn't feel the way I feel now
You bring me zen, yes, you bring me zen
And you make me feel like a million billion
I'll let you in, but don't you break my heart
Don't you rip me apart, oh, don't you rip me apart

[Chorus: will.i.am]
Baby love, it should be easy
It shouldn't be complicated
It should be easy
I don't know how else to say it, say it, say it, say it

[Drop: will.i.am]
I don't know how to say it

[Verse 2: Britney Spears]
I've got visions, boy, I've got visions
Of me and you happily just livin'
I know they're out there, them beautiful men
But you my future, baby, you my right now
If there was a scale from one to ten
My love for you is a million billion
Boy, I'll love you 'til the day I'm dead
So please don't mess with my head, please don't mess with my head
[Chorus: will.i.am]
Baby love, it should be easy
It shouldn't be complicated
It should be easy
I don't know how else to say it, say it, say it, say it

[Drop: will.i.am]
I don't know how to say it

[Refrain: Britney Spears]
La-di-dee, la-di-da
It's the only way you love
La-di-dee, la-di-da
It's the only way you love
(I don't know how)

[Chorus: will.i.am]
Baby love, it should be easy
It shouldn't be complicated
It should be easy
I don't know how else to say it

[Refrain: will.i.am]
La-di-dee, la-di-da
It's the only way you love
La-di-dee, la-di-da
I don't know how to say it