Best Dialogue Between Lead and Backup Singers

Baby, it's you (shirelles, Beatles, etc)

"You should hear what they say about you,
"cheap," "cheap"
(Sha la la la la)
They say, they say you never never never ever been true
(Cheat, cheat)

All of "Success" by Iggy

Here comes success (here comes success)
Over my hill (over my hill)
Here comes success (here comes success)
Here comes my car (here comes my car)
Here comes my Chinese rug (here comes my Chinese rug)
Here comes success (here comes success) yee-ha
In the last ditch (in the last ditch)
I'll think of you (I'll think of you)
In the last ditch (in the last ditch)
I will be true (I will be true)
Sweetheart, I'm telling you (sweetheart, I'm telling you)
Here comes the zoo (here comes the zoo)
Here comes success (here comes success)
Oh, hoo-ray success (hurray success)
(Here comes success, hurray success)
Oh, oh success (oh, oh success)
I can't help myself ( I can't help myself)
I just-just got-to-got-to-got-to (I just-just got-to-got-to-got-to)
Can't stand it (got-to, got-to, got-to)
Here comes my face (here comes my face)
It's plain desire (it's plain desire)
Here comes my face (here comes my face)
Out of the crowd (out of the crowd)
Sweetheart, I'm telling you (sweetheart, I'm telling you)
Here comes the zoo (here comes the zoo)
In the last ditch (in the last ditch)
Here comes success (here comes success)
Here comes success (here comes success)
I'm gonna do the twist (I'm gonna do the twist)
And, oh baby, I'm wiggged (oh baby, I'm wigged)
I'm crazy, I'm gonna, I'm gonna go crazy
Alright, baby, let's blast off (oh, baby let's blast off)
Blast off on success (blast off on success)
Oh, you slay me (oh, you slay me, baby) ooh
(Oh, you slay me, baby) I'm gonna do the twist (I'm gonna do the twist)
I'm gonna hop like a frog (I'm gonna hop like a frog)
I'm gonna go out on the street and do anything I want
(I'm gonna go out on the street and do anything)
Oh, shit (oh, shit)

I think it's Ronald Isley interacting with himself via overdubs, but I was recently again marveling at the call & bouncing on these lines from "Fight The Power Pts. 1 & 2":

I try to play my music
(They say my music's too loud)
I try to talkin about it
(I got the big run around)
When I rolled with the punches
(I got knocked on the ground
With all this bullshit going down)

call & bouncing = call & response bouncing

All of "Doing The Crawdaddy" by Bo Diddley, but this bit in particular:

(We gotta do the crawdaddy)
Hit it
(Look at me do the crawdaddy)
Yeah
(Look at ma do the crawdaddy)
You're looking good
(Look at ma do the crawdaddy)
You been eating regular, huh

(Yeah)

I look forward to the bit where Jonathan Richman effectively has a 3-way conversation (or 5-way, I guess) in "The Morning of Our Lives".

And it ain't just me who thinks so, dear, I asked my friends.
Now Leroy and Asa and D Sharpe...
(Leroy: yeah?)
(Asa: yeah?)
(D Sharpe: yeah?)
Tell her not to be afraid
(Leroy, Asa and D Sharpe: Don't be afraid)
Tell her it's okay
(Leroy, Asa and D Sharpe: It's okay, it's okay)
Tell her it's alright
(Leroy, Asa and D Sharpe: It's alright, it's alright)

And our time is now
We can do anything we really believe in
Our time is now
Here in the morning of our lives

I wanna say a little more
Dear, I asked Leroy and Asa and D Sharp and they said...
(Leroy, Asa and D Sharpe: Yeah? Yeah? Yeah?)
Do you love her too?
(Leroy, Asa and D Sharpe: Yes, we do.)
Then tell her she's okay
(Leroy, Asa and D Sharpe: You're okay, you're okay)
Tell her she's alright
(Leroy, Asa and D Sharpe: You're alright, you're alright)

Obviously : A little better all the time (it can't get no worse) !

So happy to see that Modern Lovers one here.

Give Him a Great Big Kiss! It's the whole song really but I'll call out

Well, what color are his eyes?
I don't know, he's always wearing shades
Is he tall?
Well, I've got to look up
Yeah? well I hear he's bad
Hmm, he's good-bad, but he's not evil

RIght, that seems to keep coming up. B-b-but wazzabout Leader of the Pack?

Spiritualized "I Think I'm in Love"

I think I'm in love
Probably just hungry
I think I'm your friend
Probably just lonely
I think you got me in a spin now
Probably just turning
I think I'm a fool for you, babe
Probably just yearning
I think I can rock and roll
Probably just twisting
I think I wanna tell the world
Probably ain't listening
Come on

Etc

I know a bitch

WHAT BITCH?

she's number one

NUMBER ONE

I told that bitch to lick my ass with her tongue

DID SHE DO IT?

Yes she did it

GOD DAMN

I'm trying to use my halo as a life preserver but
It's sprung a leak THIS IS HOLY MURDER
I'm watching my Life swirl DOWN THE DRAIN
And I feel about as ABEL AS CAIN
But I guess that that's the PRICE OF FAME
When you're destined to live in a STREET OF SHAME!
"YOU ARE DESTINED TO LIVE,
DESTINED TO LIVE,
DESTINED TO LIVE ON THE STREET OF SHAME!"
I can't shut off my ears to that infernal internal refrain
"YOU!
ARE!
DESTINED TO LIVE,
DESTINED TO LIVE
ON THE STREET OF SHAME!"

I'M ON A DEATH KNELL... IN A HEAVENLY HELL
I can't shut off my ears
To that infernal internal refrain.
."YOU ARE DESTINED,
DESTINED TO LIVE ON THE STREET OF SHAME...
STREET OF SHAME!"

"The Morning of Our Lives" is just too good for words, perhaps partially improvised?

He seemed to be always doing stuff like that anyway, so yeah.

"If it gets really really bad... if it ever gets really really bad..."
"Let's not kid ourselves. It gets really really bad."
https://www.youtube.com/watch?v=VtA869eH21c

Oh god, yeah.

Randy Newman ftw:

(Shame, shame, shame, shame, shame)
I ain't ashamed of nothin'
(Shame, shame, shame, shame, shame)
I don't know what you're talking about
. . .
(Shame, shame, shame, shame, shame)
Could be right
I've sunk pretty low this time
(Shame, shame, shame, shame, shame)
These are truly desperate times
. . .
Do you know what it feels like
To have to beg a little bum like you for love?
Goddammit, you little bitch
I'd kill you if I didn't love you so much
(Shame, shame, shame, shame)
Shut up!
. . .
If you could find it in your heart, if you got one
To forgive me
(Shame, shame, shame)
I'd be ever so grateful...
Will you stop that, please?
(Shame, shame, shame)
Will you stop that, please? I'm trying to talk to someone
(Shame)
Thank you

Ernie K-Doe - A Certain Girl

There's a certain girl I been after a long, long time
(What's her name?
Cant tell you

https://www.youtube.com/watch?v=RBeew18OmfU

Not a "best" here, but Sam the Sham's Oh That's Good, No That's Bad

https://www.youtube.com/watch?v=uheHQ23dTw4

The “what about the voice of Geddy Lee” part of “Stereo.”

Love the dialogue between Kevin Rowland and Billy Adams on 'This Is What She's Like'.

(Kevin): The Italians, I believe the Italians have a word for it.
(Billy): What word, what is it?
(Kevin): I don't really know, a thunderbolt or something.
(Billy): What you mean the Italian word for thunderbolt?
(Kevin): Yeah, something like that. I don't speak Italian myself, you understand.
(Billy): No?
(Kevin): No, but I know a man who did.

Playing the straightman role didn't make Adams sound like the sharpest tool in the box, however. See also 'One of Those Things':

(Kevin): There was just one problem.
(Billy): What was that?
(Kevin): It all sounded the same.
(Billy): You mean it all sounded similar?
(Kevin): I mean it all sounded the same.