Our first guest is here for my birthday show.

He's always been one of our favorites around here.

He's been here many--

I think this is his 27th time.

Take a look at this.

Here to make his daytime television debut,

please welcome the adorable Justin Bieber.

[MUSIC - JUSTIN BIEBER, "ONE TIME"]

Let me tell you time.

I'mma tell you one time.

And I'mma be your one guy.

[SCREAMING]

I'mma tell you one time.

I'm on my way to go surprise Paige.

She says she's my biggest fan.

Here we go, Ellen.

His songs are very motivational.

[KNOCKING]

Is that my mother again?

Hey.

How are you?

Here you go.

These are for you.

You're kidding.

No, I'm not kidding.

Oh, my God!

I love you!

Is it too late now to say sorry?

'Cause I'm missing more than just your body.

Oh, oh, oh.

Follow my finger, not your head, just your eyes.

Just your eyes, not your head.

Go faster.

Go real fast.

So your not taking this seriously.

Oh, my God.

Sorry.

I have one more surprise for you.

Oh, that's right.

Justin's going to be in Michigan.

We're actually going to give $1 for every ticket

to your school.

Please welcome Justin Bieber.

[MUSIC - JUSTIN BIEBER, "YUMMY"] Yeah,

I know that I let you down.

Is it too late to say I'm sorry now?

I'm sorry.

Please welcome my friend Justin Bieber.

Yeah, you got that yummy, yum, that yummy yum,

that yummy yummy.

Yeah, you got that yummy yum, that yummy yum,

that yummy yummy.

Say the word, on my way.

Yeah babe, yeah babe, yeah babe, any night, any day.

Say the word, on my way.

Yeah babe, yeah babe, yeah babe, in the morning or late,

say the word, on my way.

Well, aren't these beautiful.

Thank you so much, my friend.

This is your 27th time.

And this is your second time for my birthday show, which is

so lovely for you to be here.

It's awesome.

Do you remember, did you see that montage we just showed?

I did.

Yeah, I was right there.

Do you remember all of those?

I do, yeah.

They were all so different.

It was in all different places and times in my life,

different places in my life.

I kind of grew up on your show, now that I think about it.

Yes.

You owe me a lot.

I do.

No, I know what you mean.

No, you don't.

But if you want, you know, a little cut, I'll take it.

Do you have a favorite memory of anything

that you did on the show?

I just love the fact that what you do so brilliantly

is you create such an amazing atmosphere for me

to feel like I can be myself.

And I just-- I really appreciate that.

Also, I love doing all of the pranks and whatnot.

All of those are fun as well.

Moments like that to just be silly and just, like I said,

be myself, that is a big part of who I am.

I'm just a silly person.

And you've always accepted me for me.

And that's an amazing quality.

So thank you so much.

It's true.

And I love you for who you are also

because really, you came on the show

when you were first discovered.

And I love the documentary so much.

And it really explains to people what you went through

and why you needed to take a break.

Yeah.

Are you happy with it?

I am really happy with it.

Yeah, thank you for asking.

Yeah, it's really good.

And they talk about how your dopamine levels, like, what

that does to a person's brain at such a young age or any age.

When you're surrounded by that kind of noise and excitement

for so long, did you realize that that

was, looking back on it, what it was doing to you?

I was 15 when I really started touring.

And with that being said, you're on tour--

the depletion of dopamine.

And the best way for me to describe it is I'm

going out there every night.

And I'm giving, giving, giving, giving, giving.

And I don't understand how to give myself

the proper nutrients I need back and all that sort of stuff,

because I'm a kid.

And I'm doing all the rest of the stuff

too, growing up and experimenting with drugs

and doing all that sort of stuff.

So I just didn't realize the craziness that--

the toll that my body would take.

So yeah.

It was a lot.

It was a lot, yeah.

And I'm so glad you're back because you took a break.

Thank you.

And this makes me so happy that you're singing again.

You're writing again.

The songs are great.

Thank you.

There's a guitar back there.

I don't know if you noticed that.

Yeah.

I brought you flowers.

But I also really wanted to sing you a little something.

Well, OK.

You sure?

OK.

You don't have to beg me.

So as you guys know, I have a song called "Yummy."

[CHEERING]

So I tuned my guitar backstage.

And now it's higher.

So I've got to figure out whether I can still

hit these notes.

(SINGING) Yeah, yeah, you got that yummy yum,

that yummy yum, that yummy yummy.

Yeah, you got that yummy yum, that yummy yum, that yummy yum.

Say the word, on my way.

Yeah babe, yeah babe, yeah babe, any night, any day,

say the word, on my way.

Yeah babe, yeah babe, yeah babe, in the morning or late.

I think it's her birthday too.

Shall we sing her happy birthday?

[CHEERING]

We need everybody in this room to sing with me.

Do you think you guys can do that?

Yes!

[CHEERING]

Ready?

(SINGING) Happy birthday to you.

Happy birthday to you.

Happy birthday dear Ellen.

Happy birthday to you.

Great job.

Great job.

Great job.

Thank you, everybody.

That's a little sneak peek.

More with Justin after this.

We'll take a break.