School's out, it's summertime 
I know a girl and I wish she were mine 
I think about her but she's by best friend's girl 
WHoaa oooh 

He doesn't know what's on my mind 
He doesn't know she's with me tonight 
She tells me everything, we go out everywhere 
I know it's wrong but I don't care 

Cause she's my best friend's girl 
Now I'm livin' in my best friend's world 
Cause she's the only one for me the only girl I need 
And she's gonna be mine somehow 

You know that she's my best friend's girl 
Can't stop livin in my best friend's world 
Cause she's the only one for me the only girl I need 
And I'm losin' my best friend now 
For my best friend's girl 

Oooh whoaa oh 

He's tellin' me that things are fine 
With every word it's like I'm losin' my mind 
She says they always fight all day and every night 
But when she's with me it's all alright 

Cause she's my best friend's girl 
Now I'm livin' in my best friend's world 
Cause she's the only one for me, the only girl I need 

And she's gonna be mine somehow 

You know that she's my best friend's girl 
Can't stop livin' in my best friend's world 
Cause she's the only one for me, the only girl I need 
And I'm losin' my best friend now 
For my best friend's girl 

When she looks at me I can hardly breathe 
She keeps tellin' me that we're meant to be together now 
Oh! 

School's in, it's study-time 
I know a girl and now she's mine 

She's my best friend's girl 
Now I'm livin' in my best friend's world 
Cause she's the only one for me, the only girl I need 
And she's finally mine somehow 

You know that she's my best friend's girl 
Can't stop livin' in my best friend's world 
Cause she's the only one for me, the only girl I need 
And I'm losin' my best friend now 
For my best friend's girl 

Oh whoaa oh 
for my best friend's girl 
(repeat)