Ariana Grande treated fans at her Atlanta concert Tuesday (November 19) night with an extra special Victorious cast reunion that included several musical numbers.

The "7 Rings" singer posted a cryptic tweet that shared her excitement and nervousness for the concert. Victorious cast members Elizabeth Gillies and Matt Bennett replied to the tweet sparking more speculation that they would be attending the show.

Prior to Grande hitting the stage, "Make It Shine" played over the arena's loudspeaker. The iconic Victorious theme song had fans jumping and screaming along, including Bennett who proceeded to go into the general admission pit with fans and dance along to the track.

Bennett then hit the stage to perform "I Think You’re Swell," which his character on the show, Robbie, sang to Grande's character, Cat. Once Grande went on stage, she praised his performance before teasing more surprises.

Gillies then joined Grande on stage to the roars of fans. The pair performed "Give It Up," which Cat and Jade, Gillie's character, performed in Season 1 of the show.

The surprises didn't end there. During "thank u, next," Gillies appeared on stage donning the Santa Claus dress she wore in the music video alongside Grande. Bennett also joined them on stage with a toothbrush in hand, much like his role in the "thank u, next" music video.

After the concert, Grande shared pictures of the reunion and gave a shoutout to the rest of the cast. "@VictoriaJustice @LeonThomas @Jogia @DaniellaMonet look how special this is," she wrote on her Instagram story. "We love you and wish you all could have been here tonight."

See clips of the performances, below.