[Verse 1: will.i.am]
Let me tell you 'bout my girlfriend
My girlfriend Mona Lisa
She let somebody take her picture
So she could be a fashionista
She says she wanna be a model
But what she wanna be a model for?
She told me that she wanna travel
Walk the rumors in Milano

[Chorus: will.i.am]
But I tell her that I love her, adored her
I need her, my Lisa
She told me trust her, I want to
I wanna trust her
And I don't know why it hurts me, hurts me, hurts me
I get jealous when she working, working, working
All the fellas, they be looking, looking, looking
They looking at my Lisa, Lisa, Lisa

[Vocal: Nicole Scherzinger & will.i.am]
Mm
Mm (Mona Lisa)
Mm (Mona Lisa)
Mm (Mona Lisa)
Mm
Mm
[Verse 2: will.i.am]
Let me tell you 'bout my baby
My baby Mona Lisa
She told me that I'm acting crazy
She said I need to free her
She said she feel like she in prison
But why she feel like she in prison?
We always go into the ocean side and the mountain top
We be living a good living

[Chorus: will.i.am]
But she wanna be a model and travel
And walk in the rumors in Milano
She say I'm jealous, I know I'm jealous
Because I want her only for me and not the fellas
And it hurts me, hurts me, hurts me
All the time she be working, working, working
Them boys be flirting, flirting
They flirting with my Lisa, Lisa, Lisa

[Post-Chorus: Nicole Scherzinger]
La-di, la-di-da, la-di-ro
La-di, di-di-di, di-la-di-da
La-di, di-di-di, di
La-da-da-da-di, li-di-do
La-di-di-di
[Outro: will.i.am]
Smile for me Mona Lisa, Lisa
Smile for me Mona Lisa, Lisa
Smile for me Mona Lisa, Lisa
Smile for me Mona Lisa, Lisa, Lisa