[Verse 1: Nelly]
You woke up this mornin', yawnin'
Your phone is blowin' up (Brr-brr)
They sayin', "Let's go out tonight"
That low-cut Versace you bought in your closet
For this here occasion, you gon' look amazin' tonight
Play that playlist (Yeah), gettin' ready with your best friend (Uh-huh)
Shawty, you a gift and blessin' downtown with your presence (Yeah)
ID in your pocket (Uh-huh), didn't even bring your Prada (Uh-uh)
'Cause you ain't worried about payin' for nada

[Chorus: Chris Lane]
'Cause it's your birthday, girl
The day your mama brought you into this world (Yeah)
Give what she gave you just a little more shake than you normally do
Today, you can have your cake and eat it too
Tonight's your night (Your night)
Dance on the table, kiss a random guy (Like me)
Forget the haters watchin' you act a fool 'til the last song
It's your bash, get your smash and your sash on
'Cause it's your birthday, girl
Happy birthday, girl

[Verse 2: Nelly]
Let 'em know you know how to work your backside (Twerk)
Let 'em know, pin them hundreds on the front side (Work)
You the queen, it's your day to be a handful
Show out to blow out, blow out your candles
[Chorus: Chris Lane]
'Cause it's your birthday, girl (Hey, hey)
The day your mama brought you into this world (Ayy)
Give what she gave you just a little more shake than you normally do
Today, you can have your cake and eat it too
Tonight's your night (Your night)
Dance on the table, kiss a random guy (Like me)
Forget the haters watchin' you act a fool 'til the last song
It's your bash, get your smash and your sash on
'Cause it's your birthday, girl

[Bridge: Nelly & Chris Lane]
Tell 'em what you dream (Tell 'em), make it disappear
Girl, this kinda happy only happens once a year (Right there)
Tomorrow, you can chill (Can chill) in bed all afternoon
But tonight, let's get it crackin', keep poppin' like a balloon
'Cause it's your birthday, girl
Happy birthday, girl (Yeah)

[Chorus: Chris Lane]
'Cause it's your birthday, girl (Hey)
The day your mama brought you into this world (Yo)
Give what she gave you just a little more shake than you normally do
Today, you can have your cake and eat it too (Your cake and eat it too)
Tonight's your night (Your night)
Dance on the table, kiss a random guy (Like me)
Forget the haters watchin' you act a fool 'til the last song ('Til the last song)
It's your bash, get your smash and your sash on
'Cause it's your birthday, girl
Happy birthday, girl (Oh)
'Cause it's your birthday, girl
(Happy birthday, girl)