Ariana Grande Breaks Down Crying After Final 'Hairspray Live!' Rehearsal -- See the Sweet Moment

Getty Images

Ariana Grande had an emotional moment with her Hairspray Live!co-star, Derek Hough.

After the final rehearsal for the NBC musical, which airs tonight, the 23-year-old pop star -- who plays Penny Pingleton in the production -- broke down, knowing that the experience was coming to an end. Hough, who portrays Corny Collins, captured Grande's tearful moment on video and posted it to Instagram. "It's tomorrow night and I'm already crying," the "Dangerous Woman" singer is heard telling Hough as she gives him a hug while tears stream down her face.

"I came out to the hall jokin' around and this sweet lil' soul was feeling emotional about this amazing journey ending," the Dancing With the Stars pro captioned the video. "Such a pleasure sharing this experience with you @arianagrande #tomorrowistheday #hairspraylive #newfriends #newfamily #grandelove."

WATCH: The Hairspray Live! Cast Just Did the Most Epic Mannequin Challenge Ever

Grande also admitted to crying ahead of the live show. "I'm so proud of my friends and of everyone involved in this production and of the message of this show, #Love ! We have so so much of it and we can't wait to share it with you tonight," she posted to Instagram on Wednesday. "I'm so thankful to have so many new people in my life who are literally going to be around forever. No option. I love you. So much. Crying."

There was clearly a lot of love on this set. "I love my @nbchairspraylive family with all my damn heart," Grande wrote in an earlier post. "What an honor and a dream come true this has been. I wish we could do this forever."

MORE: Ariana Grande Says Hairspray Live! Is 'Way Much More Fun' Than Pop Music

While speaking to ET a few days prior to theTV event, Grande was already losing it. "We've cried ten hundred times today," Ariana Grande admitted, standing next to co-star Kristin Chenoweth, who plays Velma Von Tussle. "The two of us are basket cases. It's such an emotional journey for everybody."