-Welcome back... -Right? How scary.

-It was scary.

-Yeah, we could be really creepy.

-No. no, you were not --

But I want to talk about this event because this is

the biggest -- it's a giant thing.

It's the first. -It's huge.

-I mean, "Evolution."

What does it feel like to be part of this?

-Oh, my gosh. -Wow!

-It's -- I mean, it's so amazing.

You work so hard to get to this moment.

And, like, Brie and I have been with the company

for 12 years with WWE.

And sometimes, you don't even know if you're going

to be a part of these moments, but you just want to work hard

to get women to these moments.

-Right. -And the fact that I'm going

to be there, and competing against Ronda Rousey

and having my twin sister next to me,

I mean, it's a dream come true. It really is.

-It's kind of one of those feelings that it's like

the impossible became possible and women at WWE

never thought this day would come.

And the fact that it's here, it's just a huge honor.

It makes us all emotional and... -Yeah!

-Right? -That's big. That's awesome.

-Yeah. -If you think about --

-Body slams for everyone tonight.

-Yes, yes. Line up.

-Everyone gets body slams tonight, yeah.

I mean, I have two little girls, but I just think it's going

to be great for them to grow up, watching this and knowing this.

And they'll just always remember

that that's always a part of their life.

-Yes. -They didn't know that there was

none of the -- you know, no "Evolution."

-Right. -Yeah.

-But it's a big deal.

I mean, this is like -- this is the championship

against Ronda Rousey. -Whew!

-Ronda Rousey -- she's a tough cookie, man.

-Oh, my goodness.

I've been doing, like, training like no other,

like training like an Olympic athlete.

-You're really going for it this time.

-And it hurts. Oh, I'm going for it.

-Yeah. -I mean, I've had to change up

my whole routine.

I mean, I'm in there with this legitimate fighter,

and who is also a judo specialist,

has been to Olympics.

And I'm just like, okay, I didn't even know

how to get out of arm bars, for one.

Because I don't want to break my arm.

-That's right. No, the arm bar. That's a thing.

-The arm bar. You've been put in the arm bar.

-She put -- did it to me on the show once

and I almost started crying. -Yeah.

-So, yeah. -Yeah, I wasn't acting,

that was like, yeah. -And I don't like to tap, so...

-Really? -Yeah.

-But I've seen you on a bad day. I think you can handle her.

-Really? Some people -- -What does that mean?

-You know.

-But Ronda's been -- she's undefeated, right?

She's 24 and 0. -Yeah.

And I mean, I've had 600 matches.

I might have had 245 losses, but, you know, yeah,

we'll give her the 21 and 0 or 24 and 0.

-Yeah, but after this Sunday, I think it will be 24 and one.

[ Cheers and applause ]

[ Indistinct talking ]

Can we talk about "Total Divas," because we talk about

"Total Bellas" which, you know, is one of my favs.

-Yeah. oh. -What's happening with

"Total Divas" this year?

-Well, did anyone see Miami last night?

-I mean -- -You just can't go to Miami.

I mean, well, I mean, you can go to Miami.

-You can. It's just, you know.

-For -- -You just can't remember it.

-Oh my gosh. -You say that about Vegas,

but I'm like, I don't know. I think that Miami is worse.

-I don't even know. -Yeah.

Because you get the sunshine. Oh, you get the sunshine.

-It's been getting amped up in Miami.

-Right. -But then, we get very spiritual

towards the end of this season and all go

to Lake Tahoe, which it's beautiful.

Has anyone ever been to Lake Tahoe?

Have you been to Lake Tahoe? -Never.

-Right. -It's amazing.

-It's gorgeous. The water is just magical.

I end up writing poetry, and...

-Everyone else --

-It was like a Kumbaya moment. -We're all crying.

We're like lighting fires in a good way,

controlled environment. [ Laughter ]

-I mean -- it's. I'm like, "What happened to us girls?"

-Isn't that amazing? "What happened to us?"

-Yeah. We don't want to fight anymore.

We want to sing.

-No, because Sunday, it's going down.

-Oh, yeah, now we want to fight!

-Yes! That's what I'm saying!

[ Cheers and applause ]

Now look, Nikki, on Sunday night,

you're competing for the RAW Women's Championship

at "WWE Evolution."

Tonight, though, there's another championship belt

going up for grabs. -What?

-Yeah, look at this right here.

This is "The Tonight Show" Thumb Wrestling Championship Belt.

-Oh! -Oh, matches my dress.

I better win. -[ Laughter ]

-Here is the deal. How do you feel about facing off

in a thumb wrestling match? [ Laughter ]

-Oh, I'm down.

-I'm ready. -Here's how it works.

The official Tonight Show" thumb wrestling ring here.

Okay, I will be the referee.

-Ooh! -I'll have the belt.

-Nice. -Okay, here we go.

Come around, I want a fair fight.

Okay, just -- I think you actually have to --

Yeah, you grab it from there. -Like this?

-Okay, don't cheat -- -Look, I'm already injured.

So you'll have to -- Oh, my God. You're injured.

Don't cheat already. Guys, ready?

-So we go like this first, right?

-Yeah, I'll do the one, two, three, four.

One, two, three, four, I declare a thumb war!

Go! [ Cheers and applause ]

One. Ooh!

One, two, three!

Oh, the winner!

[ Bell dinging, cheers and applause ]

Nikki Bella, Nikki Bella!

Wait. I have this little belt right here.

Goes right on your little thumb right there.

-Oh, does it go that way? -Yeah, perfect.

There you go. Look, isn't that nice right there?

[ Cheers and applause ]

Nikki and Brie Bella, everybody.

"WWE Evolution" takes place Sunday night

live on the WWE Network.