over the last 12 seasons, and this next guest

has quickly become one of my favorites.

She's nominated for four Grammy Awards.

Here to perform "Elastic Heart," please welcome my friend Sia.

[cheers and applause]

[upbeat atmospheric music]

[singing] - And another one bites the dust

But why can I not conquer love?

And I might've thought that we were one

Wanted to fight this war without weapons

And I wanted it, I wanted it bad

But there were so many red flags

Now another one bites the dust

And let's be clear, I trust no one

You did not break me

I'm still fighting for peace

Well, I've got a thick skin and an elastic heart

But your blade, it might be too sharp

I'm like a rubber band until you pull too hard

Yeah, I may snap, and I move fast

You won't see me fall apart

'Cause I've got an elastic heart

I've got an elastic heart

Yeah, I've got an elastic heart

And I will stay up through the night

Yeah, let's be clear, won't close my eyes

And I know that I can survive

I'll walk through fire to save my life

And I want it, I want my life so bad

I'm doing everything I can

Then another one bites the dust

It's hard to lose a chosen one

You did not break me

I'm still fighting for peace

Well, I've got a thick skin and an elastic heart

But your blade, it might be too sharp

I'm like a rubber band until you pull too hard

Yeah, I may snap, and I move fast

You won't see me fall apart

'Cause I've got an elastic heart

Oh, oh-oh-oh-oh-oh, oh, oh, oh, oh

Oh, oh, oh, oh

Oh, oh-oh-oh-oh-oh, oh, oh, oh, oh

Oh, oh, oh, oh

'Cause I've got a thick skin and an elastic heart

But your blade, it might be too sharp

I'm like a rubber band until you pull too hard

Yeah, I may snap, and I move fast

You won't see me fall apart

'Cause I've got an elastic heart

I've got an elastic heart

[cheers and applause]

- Thank you so much.

- Sia. - Hi, babe.

[giggling]

- Sia. - Yes.

- So--so you're nominated for-- four Grammy nominations.

- Yeah. - Congratulations on that.

- Thanks.

- And you have an announcement, right?

About the Grammys? - Oh, yeah.

What--I've forgotten.

That I'm gonna do a performance?

- That's what it is, yes.

- That's the-- that's the announcement.

- You're gonna actually do a performance on the Grammys.

- Yup. - It's exciting.

Always-- [cheers and applause]

- I love you.

- Catch Sia on the 57th Annual Grammy Awards

February 8th at 8:00 on CBS.

The name of the CD is...

both: "1000 Forms of Fear."

- Everyone in the audience is getting a copy.

- Yeah! [cheers and applause]