and they don't show me until today,

so I'm told a certain celebrity sent a video in today.

I haven't seen it. We're gonna watch together.

- Yo, what's up, Ellen?

It's Justin Bieber here, and I just wanted to say

I haven't seen you in a long time, and--

just wanted to say happy birthday.

Happy 21st, you know?

And I don't know why I'm even doing this video

when I'm in the building, right?

So I should-- - What?

[cheers and applause]

- Oh! - Got you gifts.

- Gifts!

- So I got you flowers

Flowers for your birthday, and then I also got you

some Calvin Kleins.

- Oh, thanks.

Calvin Klein underwear, everybody.

You know it

[cheers and applause]

I usually, I only wear my Ellen underwear,

but I will wear these because of you.

- Will you wear those? Yeah. - Yeah.

- Thank you.

- I have been showing, as everybody has been showing...

first of all, thanks for being here for my birthday.

- Of course, it's been a-- - That's so sweet of you.

But I've been showing the Calvin Klein ad.

Have you seen his Calvin Klein ad?

'Cause if not-- [cheers and applause]

if not...

I mean, damn.

And very impressive drumming too.

That was-- - Thank you.

- Yeah. - Thank you.

- That's--congratulations.

That's a huge thing, right?

And it's getting a lot of attention.

- Yeah, man. It was a lot of fun to do.

- I don't know if people know this,

but this was--this was the first show you ever did.

You were 15 years old. - Yes.

- And the way-- I mean, I just--

we've watched you grow up.

I mean, you're a totally--

- And honestly, I haven't been on TV for a while,

so I'm a little nervous.

- Oh, well, thank you for being here.

Don't be nervous.

I mean, you're crazy talented. - Thank you.

- And I appreciate-- you're doing something that--

[audience exclaims] Oh.

Look at that kid. - That is cute.

- Now, what do you think when you look at that?

Do you remember that-- that--

- I do.

I remember being pretty nervous then.

It was my first time, like, on big TV.

And I don't know.

I just get nervous in front of, like, crowds

when I'm not singing, you know?

'Cause I'm naturally, like, a performer.

- Yeah.

- But to sit down and be on camera

and, like, have to say things and being worried about--

- Like that, yeah. [laughter]

- You know? - Yeah.

No, you know, I think a lot of people

that are in this business--

people don't understand that you can be

an extrovert when you're performing,

but you're an introvert all other times.

- Right? - Mm-hmm.

- 'Cause I feel like I'm that person anyway.

So Scooter-- [laughter]

I'm just speaking for me.

Scooter, your manager, texted me and said,

"Will you be a part of the roast

that they're doing on Justin for the Comedy Central thing?"

And I'm like, "No, I'm not gonna roast him.

I don't like being mean to people."

Why would you allow-- why are you doing this?

- I think it's just cool to, like,

be able to laugh at yourself, you know?

I've done some things that might not have been the greatest.

- Really? [laughter]

Nothing comes to mind. - I know, right?

- I don't know what you're talking about.

[laughter and applause]

- But I-- - [laughs]

- I just want to be able to, you know, laugh about it

and, you know, be-- kind of just own up

to some of the things, you know?

- Good for you.

And I know, because I know Scooter

and I know you a little bit,

that you've been taking care of yourself,

and you're doing really, really good.

And I'm proud of you. - Thank you.

- I know you've straightened up...

- Thank you. - A lot.

And you look like it. - Thank you.

- I can tell. - Thank you.

So, all right, when is the Comedy Central roast?

When is that?

- I think it's in, like, a month or so.

- For your birthday, right? Your 21st birthday.

- Yeah, it's 21st birthday. - Wow.

Well, happy 21st to you coming up.

- Thank you. Thank you.

- And thanks for being here for my birthday.

- Course, course. - I appreciate it.

- Glad I could be here.