The musical comedy also stars Demi Lovato, Pierce Brosnan, and Dan Stevens.
Ariana Grande, Demi Lovato, and Christina Aguilera also sang on the livestream.
Smith likened the collaboration to “2020 ABBA”.
Mariah Carey, Camila Cabello, and Sam Smith also featured on the livestream.
The accompanying video is an empowering statement about battling depression.
The Schitt’s Creek cast, Ali Wong, Kevin Hart, Jamie Foxx, Jerry Seinfeld, and more will be at the Los Angeles event.
The pop singer’s second appearance since making her live comeback.
An emotional return to the stage a year after a near-death experience.
Billie Eilish swept, Lizzo conquered, Demi Lovato returned, and Tyler got real.
Replay performances by Lil Nas X with BTS, Billie Eilish, Lizzo, Tyler the Creator, and more.
“Music’s Biggest Night” takes place Sunday, January 26th.
The 27-year-old pop singer will make her live comeback later this month.