The musicians played a duet, 'Perfect,' at the Global Citizen Festival in South Africa.
ET is taking a look at how the top artists fared this year.
ET caught up with the new host of 'The American Baking Show: Holiday Edition' ahead of its Dec. 6 premiere on ABC.
ET spoke with Clarkson and Adam Levine on 'The Voice' red carpet. The singing competition show airs Mondays and Tuesdays on NBC.
Cher crashed her own Broadway stage on Monday at the opening night of 'The Cher Show' in NYC.
The singer's new holiday song, 'Cozy Little Christmas,' is available exclusively on Amazon Music.
The host of the ‘Great American Baking Show’ spoke with ET about the upcoming reunion tour.
Ally Brooke also opened up to ET about keeping in touch with her former Fifth Harmony bandmates.
The 'Mean Girls' writer gushed over the singer's epic homage.
ET spoke with the music legend on opening night of Broadway's 'The Cher Show.'
ET spoke with Fey at the opening night of 'The Cher Show' on Broadway in New York City.
Here are some of the best moments from the making of Grande's epic, homage-filled new video.
Ariana Grande's 'Thank U, Next' music video director, Hannah Lux Davis, is dishing tons of the behind-the-scenes scoop to ET!
