[Intro: Madonna]
And the beat goes on, I'm a happy girl
It's my birthday song, in my happy world
I know it's gonna be a good day
Oh yeah, today is my birthday, huh

[Chorus: Madonna, M.I.A.]
And the beat goes on (And the beat goes on)
I'm a happy girl (I'm a happy girl)
It's my birthday song (Oh yeah, it's my birthday)
In my happy world (In my happy world)

[Verse 1: Madonna, M.I.A.]
Light my candles, got to make a wish
Wrap up the present and seal it with a kiss
Give me a spanking, start the day off right (Woo-wee)
Because it's my day, you are going to sing my song tonight

[Chorus: Madonna, M.I.A.]
And the beat goes on (And the beat goes on)
I'm a happy girl (I'm a happy girl)
It's my birthday song (Oh yeah, it's my birthday)
In my happy world (In my happy world)

[Post-Chorus: Madonna, M.I.A.]
I know it's gonna be a good day
Oh yeah, today is my birthday
I'm a happy girl (I'm a happy girl)

[Verse 2: M.I.A.]
My type of party, there's no hangover
So grab your things, you better come over
We get high and we still stay so-ber
We throw it down and then we going to start over
My type of party there's no hangover

[Chorus: Madonna, M.I.A.]
And the beat goes on (And the beat goes on)
I'm a happy girl (I'm a happy girl)
It's my birthday song (Oh yeah, it's my birthday)
In my happy world (In my happy world)

[Verse 3: Madonna, M.I.A.]
I want a diamond, don't give me a fake (That's what I said)
I'll let you lick the frosting off my cake (Yeah)
Give me a spanking, start the day off right (Woo-woo)
Because it's my birthday, you'll be singing my song tonight

[Chorus: Madonna, M.I.A.]
And the beat goes on (Na-na-na-na, na-na-na-na-na)
I'm a happy girl (Na-na-na-na, na-na-na-na-na)
It's my birthday song (Na-na-na-na, na-na-na-na-na)
In my happy world (Na-na-na-na, na-na-na-na-na)

[Post-Chorus: Madonna, M.I.A.]
I know it's gonna be a good day, oh yeah, today is my birthday
(I'm a happy girl) In my happy world
I know it's gonna be a good day, oh yeah, today is my birthday
I'm a happy girl
(It's my birthday everyday)

[Outro: Madonna & M.I.A., M.I.A.]
Na-na-na-na, na-na-na-na-na
Na-na-na-na, na-na-na-na-na (Gonna sing my song tonight)
Na-na-na-na, na-na-na-na-na (Gonna sing my song tonight)
Na-na-na-na, na-na-na-na-na (Gonna sing my song tonight)
Na-na-na-na, na-na-na-na-na (Gonna sing my song tonight)
"Happy birthday!"