What Billie Eilish Says Miley Cyrus Told Her Between GRAMMY Wins (Exclusive)

Billie Eilish and Finneas chat with ET’s Kevin Frazier backstage at the 66th Annual GRAMMY Awards, which aired Sunday on CBS and Paramount+. Billie reacts to winning Song Of The Year for 'What Was I Made For?' and explains why she thanked Greta Gerwig in her acceptance speech. Plus, she reveals what Miley Cyrus said to her after winning Record of the Year for 'Flowers.'

[wendycornett]

Billie is so gracious ... she's always looking for ways to shine a light on others.

[vibrationalcurrency]

Wishing those two nothing but love and light so that they may continue uplifting the world with their art.

[lucakat]

I always love seeing these two together. It's so nice that Billie remembered that interviewer. I'm glad she won. And gotta love Finneas too!❤

[BelleTolles]

Love her, so real and humble. Same with finneas. Such bright lights of talent

[upasanadas]

The fact that Bellie wore an outfit BARBIE written on it shows she really respects the movie and this award was not just for Billie it was for Finneas it was for" Barbie "also Congratulations to Miley Cyrus for her grammy win ❤

[nicholasgarrick]

Wish nothing but the best, and success for this duo billie, and finneas are amazing love them❤.

[wonwii]

I love Billie, so sweet and down-to-earth

[ganeshadevan]

This siblings so amazing. They create their own songs, and the way how they layered the songs is so smart. Musically genius both of them, that’s why they deserves Grammy. From very young age, 5 + 2 Grammy? Unbelievable

[CoolsBreeze]

That was a cute moment how the two of them just did a little dance.

[DHU]

Billie is such a charismatic girl. I’m very interested into see how she will evolve into her womanhood.

[diancamorris]

I love me some billie eilish she's is the best

[leayahia]

Finn is a genius and Billie's voice is pure Gold. ✨✨ Glad for both of them. ❤

[Dadfromtexas]

Billie is so slept on in my opinion!!! She is so talented, she has an angelic voice!! One of the best in our generation for sure

[berglettemom]

She is the cutest and her brother is the best

[afiqite]

A well deserved win!! Hope that in the future we get to see Lana win a Grammy but if she doesn’t that it’s fine because she doesn’t need a Grammy to prove that she is a legendary artist!!

[kennethscott]

Your right, Billie, barbie was the best 🎥 of the year 😮👍. I 😍 you 🙇 🎸 🌟 😘 ❤❤❤.

[natsinternetdiary]

not her giving away that they’ll be performing at the oscars 😭😂

[billyalarie]

Billie is the sweetest woman ever. She doesn’t make ANYTHING about her, EVER.

[emmagough]

I'm sorry but Billie's hair is literally gorgeous 😍😍

[makeitcount]

Song of the year !?! Cra-zy ! Last night was my first listen to that song...and it blew me a-way. I called it a Diamond. This morning I find out it's Song of the Year.
.okay. I can trust my ears. Cool.😊