Ariana Grande Videos

Sia performed her hit song Chandelier on last night's GRAMMY AWARDS with the help of one surprising backup dancer - none other than SNL alum Kristen Wiig!

Below, watch Katy Perry perform 'By the Grace of God' at last night's show!

Below, watch Hozier and Annie Lennox perform 'Take Me to Church' and 'I Put a Spell On You' at last night's show!

Below, watch Rihanna, Kanye West and Paul McCartney took the stage to perform a live debut of 'FourFiveSeconds.' at last night's show!

Tony Bennett and Lady Gaga won the 2015 Grammy Award for Best Traditional Pop Vocals for their album 'Cheek to Cheek.' Below, watch the duo perform 'Cheek to Cheek' at last night's show!

Below, watch Ed Sheeran & ELO perform 'Mr. Blue Sky'at last night's show!

Below, watch Adam Levine and Gwen Stefani Perform the ballad 'My Heart Is Open' at last night's show!

Below, watch Kanye West perform his single, 'Only One,' for the first time since its release on Dec. 31.

Below, watch Ed Sheeran perform 'Thinking Out Loud' with Questlove, Herbie Hancock, John Mayerfrom last night's show!

Below, watch Madonna's live performance of 'Living for Love' from last night's show

Below, watch Ariana Grande performance of 'Just a Little Bit of Your Heart' from the show

People write very nasty things on Twitter. From time to time, JIMMY KIMMEL LIVE likes to shine a light on that.

Music guest Ariana Grande performs 'One Last Time' for the Tonight Show audience.

In honor of last night's Super Bowl, Jimmy Fallon and the Roots joined Carrie Underwood, Sam Smith, Ariana Grande, Blake Shelton, Usher, Meghan Trainor, One Direction, and Christina Aguilera for an a cappella version of 'We Are the Champions'

"RuPaul's Drag Race" returns to Logo TV with a gaggle of queens so ingenious, a competition so unpredictable and a judges' panel so packed with talent, you'll be seeing stars! Get a sneak peek below!

From Academy Award-winning director Juan Jose Campanella comes UNDERDOGS, an animated comedy with a little bit of magic and a whole lot of heart. Check out the first official trailer below, featuring the voices of Broadway vets Matthew Morrison, Ariana Grande and more!

Among the featured performers at this year's parade was pop star Ariana Grande, who performed the holiday classic 'Last Christmas' and 'Santa Tell Me.' Check out both performances below!

Ariana Grande teamed up with with Michael Buble on his annual holdiay special MICHAEL BUBLE'S CHRISTMAS IN NEW YORK, which aired Wednesday, December 17th on NBC.

Multi Grammy Award-winning singer Michael Buble celebrated the holiday season with his fourth annual NBC Christmas special, MICHAEL BUBLE'S CHRISTMAS IN NEW YORK, which aired tonight, December 17. Click below to watch Ariana Grande perform 'Last Christmas' during the show!

Unless you've been living under a rock this year, you will know that this year has been the YEAR OF IDINA MENZEL. With Elsa from FROZEN and her soaring vocal on Bobby and Kristen Lopez's 'Let It Go', inspiring more YOUTUBE videos than even Pharrell Williams' 'Happy' and then, John Travolta's 'gaffe' on Oscar night, annointing her with the new name of ADELE DAZEEM, it was off to a pretty good start.