Lyrics:

“Knock Knock” peaked at #75 on the Billboard Hot 100 and #24 on Billboard’s R&B chart.

The song samples The Masqueraders' song “It’s a Terrible Thing to Waste Your Love.”
Hey, yo, Mo, open up the door, man
I'm sorry, baby, open up the door
You got these dogs out here, they gon' bite me
Poodles and rabbits and all of it
Open the door man, I'm sorry, man
I love you

(It's funny how the tables turn, turn, turn, turn)
Uh-uh (Oh-ooh) and it's so, woo
(Woo-ooh, yeah) This that hot
(Woo-yeah) Uh-huh, yeah
New Monica!

It's funny how the tables turn
Now it's you running after me (Uh)
Didn't wanna spend quality time
Didn't think I would ever leave (Woo)
You got way too comfortable (Oh)
Now you say you want me in your life (Uh)
'Cause I've packed up all my shh (Woo)
I'm moving in my new place tonight

So don't you, knock knock knock
Stop knockin' (Stop knockin')
Don't come knockin' on my door (Yeah)
(Ooh yeah) Ring ring ring (Ring)
Let the phone stop (Oh)
I don't want you calling me no mo'
{Uh-huh, so, so}

Boy, it's a dangerous game
To try and play a chick like me (Uh)
Wanna go out and do ya thing
I'll be out 'fore you count to three
So do just what you want
Any time that you really like
I put a payment on my place
You'll be sleeping alone tonight

So don't you, knock knock knock (Knockin', oh)
Stop knockin', don't come knockin' on my door
(Don't you come knockin' at, woo, hey)
Ring ring ring (Ring)
Let the phone stop (Oh)
I don't want you calling me no mo'
{Uh-huh, so, so} (Yeah)

I used to be 'So Gone'
You were someone I could lean on
My life support system
And I thought I couldn't breathe, uh-uh
When you used to leave, yup yup (Yeah) {Oh}
I see you got your clean on
Big chains, gold teeth and your gleam on
All night, wanna be gone
Wanna tell me stay home like I got a—uh!—ring on {Woo}
Now you say I'm not your wife, right? Right? {Uh}
So why should I be chillin', goodnight goodnight {Uh}
Now pack up my things for a flight {Oh}
I got a place and it's fixed up nice {Come on}
So don't come knockin' at my door {Yeah!}
I got company coming 'round four {Uh-uh}
So, whoa, heh-heh, yeah {Ooh}

I don't want you calling me no mo'
Knock knock knock {Oh}
Stop knockin', don't come knockin' on my door
(Ring ring ring) Ring ring ring
Let the phone stop (Please, won't it stop)
I don't want you calling me no mo'
Don't come knockin' on my door {Uh-huh, so, so}
Don't come knockin' on my door
Ooh, ooh, uhh, ooh-ooh, uhh
Don't come knockin' on my door
(Oh, ohh-uhh, yeah, yeah, yeah)
Don't come knockin' on my door
Ooh-ooh, uh (Changed my locks) ooh-uh (To my crib)
Don't come knockin' on my door, oh (Can't come in, oh) Oh
I don't want you calling me no mo'
Don't come knockin' on my door (Changed my locks, to my crib)
Don't come knockin' on my door (Can't come in, uh) Ooh
I don't want you calling me no mo'

Hey, this Monica, leave a number after the beep
Hey, yo, Mo, pick up the phone, man
This old raggedy cell phone sounding like an old alarm clock, old switchboard line phone. Do you even have call waiting on this joint, man? Call me back, man, you're late for the studio. Dismissed