VIDEO: Ariana Grande Performs 'Problem' on DWTS Finale

Ariana Grande helped wrap up the Season 18 finale of ABC's DANCING WITH THE STARS last night, with her performance of her new single, 'Problem.' Check out the appearance below!

"Problem" is the first single off Grande's upcoming sophomore album. The track made its debut on Billboard 100 at No. 3 earlier this month. 'The singer/actress, who starred on Broadway in '13', is best known for her starring role as Cat Valentine, in the Nickelodeon hit series Sam & Cat. The series premiered in June 2013.

Last night's show began with a high-energy performance featuring a reunion of all 12 of this season's couples as well as the judges. The finale also featured a performance to "Livin' La Vida Loca," by Team Loca, giving viewers at home a chance to watch the routine live with Amy Purdy, as she was unable to dance during the original Team Night due to an injury.

Additionally, viewers were treated to encore performances by Drew Carey and Cheryl Burke to "You Can't Sit Down," Nene Leakes to "Grown Woman" featuring six Pro Dancers, Danica McKellar and Val Chmerkovskiy to "Be Our Guest," and Charlie White and Sharna Burgess to "Supercalifragilisticexpialidocious."

In the last element of competition, the couples performed a new routine as part of a "24 Hour Fusion Challenge." The remaining couples fused two contrasting dance styles that they've performed this season and had less than 24 hours to prepare that dance for judges' points.

VIDEO: Ariana Grande Performs 'Problem' on DWTS Finale