作词 : ROBERSON, ERIC/PORTER, DENAUN M
Shhhhh...! 
ManI would’ve left my tail at home
If I would’ve known that you'd be here
We're both here with someone new
And they have no clue how 
I had you dear.
I would’ve left my tail at home
If I would’ve known that you'd be here
You would be here, you would be here!
I see that you have a brand new name
That's what's up, that's what's up!
And something's sparkling on your hand!
That's what's up, that's what's up!
I wonder why you keep looking this way
You know what's up, 
You know what's up!
Are you reminiscent about yesterday?
That's what's up, that's what's up![Chorus:]
I would’ve left my tail at home
If I would’ve known that you'd be here
We're both here with someone new
And they have no clue how 
I had you dear.
I would’ve left my tail at home
If I would’ve known that you'd be here
You would be here, you would be here!
They say they that time could heal all wounds ...
That's what's up, that's what's up!
And you smile when the 
DJ played our tune
That's what's up, that's what's up!
I remember you had an appetite...
So what's up, 
U know what's up!
But I hope that he fulfills you right
That's what's up, that's what's up![Chorus:]
I would’ve left my tail at home
If I would’ve known that you'd be here
We're both here with someone new
And they have no clue how 
I had you dear.
I would’ve left my tail at home
If I would’ve known that you'd be here
You would be here, you would be here!
Now my girl's curious cause my eyes' on you
That's what's up, 
I mean that ain’t what's up
Cause I got caught up on how you used to do
Yeah what's up, that's what's up
My boy taps me and says “
Ain’t that so and so”
I know what's up, 
I know what's up
I say yeah, but come on, keep that on the low!
That's what's up, 
I know what's up
I'm talking reckless, but it's just my ego
I understand that we had to let things go, oh
You seem happier now
Can tell it by your smile...[Chorus:]
I would’ve left my tail at home
If I would’ve known that you'd be here
We're both here with someone new
And they have no clue how 
I had you dear.
I would’ve left my tail at home
If I would’ve known that you'd be here
You would be here, you would be here!
And we're both standing in the valet line...
That's what's up, that's what's up
And your man is car is in front of mine
That's what's up, that's what's up
S500 guess he's doing well
I guess he paid for your weaves and your nails, babe![Chorus:]
I would’ve left my tail at home
If I would’ve known that you'd be here
We're both here with someone new
And they have no clue how 
I had you dear.
I would’ve left my tail at home
If I would’ve known that you'd be here
You would be here, you would be here!