《Number One》的詞曲由Fetty Wap、Ty Dolla $ign和Andrew Breech共同完成，其歌詞如下：
女：
You the only one, number one
No one else compares, yeah
And I know that I'm, yeah
Your only queen, I'm so obsessed
男：
Give it all to me right now (Now)
Now put it down on me, no wrong way
Sippin' on my bottle too, 9:12 (Nights)
Yo you make it hot in here, and here
So my first line up in your lips
On your dips in that new Louis and pop
Up and in this them ice cups (Oh)
Yep you bad girl and my bad sips (Tipsy)
女：
Ooh wee ooh wee oh (You the only one)
男：
Bought my wife a couple Benzes
Yeah my real wife on my drip drippin'
I'm a real one, yeah I'm a real one (Yeah)
I ain't tryna be a cheater, no no no (No)
But I'm tryna get with the number one (Number one)
女：
You the only one, number one (Number one)
No one else compares, yeah (Compares)
And I know that I'm, yeah (I'm the number one)
Your only queen, I'm so obsessed (So obsessed)
Now come to bed and don't get loopy now (Get loopy)
You ain't gotta pack up now, you can stay now (Stay)
And if you want to go then we can go now (Now)
But you ain't the type of girl to run now (Run)
男：
Yeah yeah yeah yeah yeah (Yeah yeah yeah)
Ooh wee ooh wee oh (Yeah)
Oh yeah yeah yeah oh (Oh oh oh)
And you my favorite treat (Treat)
But you ain't my favorite bae (Bae)
Yeah you the number one and that's a fact (Fact)
You ain't gonna find another treat like that (Yeah)
Only on the weekends baby when I lay back like that (Back)
Take your sweet hour yeah (Sweet hour)
The sex will last longer, ah ah ah (Yeah)
Get to me just right babe ohhhhhh baby
Get down and grind like your boy name play boy
Make my girls bounce when we take our positions yeahhh girlyyy
It goin down it be forever without ending (Forever) no lies I said it is what it is! Oooh ooh ooh ohh ooh ohhh ooh ooh ohh ooh ooh ohhh ooh ohhh oohhh! Ohhh ohhh ohhh ohhh! Oooh ooh ooh ohh ooh ohhh ooh! Yeah! Oooh ooh ooh ohh ooh ohhh! Ohhh ohhh ohhh ohhh! Oooh ooh ooh Ohh yeahhh! 女:Ooh wee ooh wee oh. （結束）