一般都不加the的    
number one 合起来相当于是一个常用的形容词了 

只有the number one brands, the number one school    
后面再加名词的时候 加上the

Number Ones 歌词

歌曲名:Number Ones
歌手:Bow Wow & Omarion
专辑:Face Off

Skye Sweetnam - Number One
I saw my boyfriend
Hanging with this girl that I hate
He didn't have to tell me
Why last night he was late
I can't believe what you tell me
Your lies have come undone
Now I'm living on the run
Looking out for number one
I took a ride to the city
Had to get out of this place
I just can't stand the pity
When the tears fall down my face
I used to think it was over
But it's only just begun
Now I'm living on the run
Looking out for number one
One day you'll see me
But only when you're dreaming
One day you'll say
I was the one
I hitched a ride on a Greyhound
Stashed away on a train
Bought a ticket for the subway
Playing guitar out in the rain
I wanna follow the rivers
To an island in the sun
Now I'm living on the run
Looking out for number one
One day you'll see me
But only when you're dreaming
One day you'll say
I was the one
Late at night
Trying to fight
I just might think about him
Right now I'm feeling fine
I'm better off without him
Yeah Yeah Yeah YEAH!
One day...
One day...
One day...
You'll say
I was the one
One day you'll see me
But only when you're dreaming
One day you'll say
I was the one
I know that one day
You'll see me
I'll haunt you when you're dreaming
One day you'll say
I was the one
I'm number one