All right, here we go now.

This here is the Dance Move Generator.

We're gonna take turns hitting this button,

which will randomly select a never-before-seen dance move.

Whoever's turn it is has to make up a dance for that move.

And may the best dancer win. [ Light laughter ]

Blake, since you are the guest, why don't we go first?

Let's start the Dance Move Generator.

Okay.

-I just hit it? -Yeah. Whenever you're ready.

-I've sort of been doing that this whole interview.

No way. Me too.

All right, here we go.

Trying To Pretend You Don't Have A Wedgie Dance.

-Okay. -Roots, can she get a beat?

[ Rhythmic drumming ] -Okay.

-1, 2.

That's pretty good. I like that one.

-And I was -- -You had to hide behind me --

You had to hide behind me to dance.

That's a very interesting move.

-And I was able to successfully pick my wedgie.

[ Laughter ] So this was like full...

Kill two birds, man. All right.

Almost too real. Too real. Hashtag.

All right. Now it's my turn.

Let's start the Dance Move Generator.

I'm gonna put my hand on the pod.

Catching the Bouquet. Okay.

You've done this lots.

Exactly. Exactly.

Catching the Bouquet, okay. -Okay.

All right.

That's not really fair.

My -- My wife is so lucky.

I got to do more groundwork.

Yeah.

It's all the Shake Weight, man.

All right.

My mom got me that for Christmas one year.

-Oh, I got like 10 of them. -But it wasn't a joke.

-Oh, really? -Yeah.

-Yeah, it's the future of -- -She drives down in the car --

drives down the -- the highway doing that.

No way. Please don't do that. Oh.

I don't know if you could air that.

Yeah, I know. Yeah. We'll have to cut that out.

All right.

-Blake, try and top that. -Okay.

Start the generator.

Okay.

Ballerina Who Keeps Dropping Marbles.

-Okay. -Wait. Wait.

Hold on. Hold on. Hold on. -Definitely a new dance.

Wait. Okay.

Ballerina Who Keeps Dropping Marbles.

Roots.

That's beautiful.

Oh, oh, whoa, whoa, whoa! Watch out! Hey!

Whoa, whoa! Oh, my God! She did floor work!

Oh! Dropping mar-- Be careful.

Be careful! My goodness! Please be careful.

Good pratfall.

Good pratfall.

I thought it was real. Like, oh, my God. All right.

-You did floor work. -I did floor work.

You get competitive. I see. I see.

You got competitive. Let's see if I can top that.

Start the generator. Let's see what's up.

Okay, bang!

Heisman Magician? Okay?

I don't know what that means.

I guess -- what does that mean?

Like a Heisman Trophy?

Sorry.

I'm happy I'm not out of breath for that one.

But I don't know how else to do that.

The Heisman -- whatever -- You're gonna --

-You look like you need water. -You're gonna win this time.

Whatever. I'm just out of breath.

I'm just totally doughy right now.

All right, you're clearly the better dancer.

"Dancer"

Why even compete against each other?

We can dance, if we want to.

I mean, we can leave our friends behind.

Cause if you can't dance.

And if they don't dance...

Then you're no friend of mine.

Let's do one more dance together.

Okay.

Let's start the Dance Move Generator.

-Do it together, right? -Yeah, here we go.

-1, 2, 3. -1, 2, 3.

-I know that. I can -Yeah, yeah.

-I can do that. -Yeah, it's like --

-Riverdancing Frankenstein. -Yeah, we always do that, right?

Yeah, yeah, of course. That's -- What are we doing?

-Well, 'cause like -- yeah. Do you want to...

-Start from backstage? -Like this.

Together? Together or on --

Each side. Yeah.

Yeah. Ready?

The best in the business --

Blake Lively!

That is all for "Tonight Show Dance Battle".

Our thanks to Blake Lively. Stick around.

We'll be right back with Gabrielle Union!