Ariana Grande & Dove Cameron Became Instant 'Hairspray Live!' Besties!

Though they’ve heard a lot about each other for years, Dove Cameron and Ariana Grande had never met before Hairspray Live!.

So when they were first introduced on set, Dove was extremely excited.

“She’s really cool�a total sweetheart,” she told JJJ. “We have actually a lot of mutual friends. My best friend Colton [Tran] is a good friend of hers and I’m really good friends with Jennette [McCurdy]. We’ve always sort of been in the same similar circles with Nickelodeon/Disney but we actually had never met. I had met [her brother] Frankie and I met her mom a couple times.”

The night before the Hairspray Live! press junket, Ariana had the gang over to her mom’s house to celebrate.

So what’s a hang with the “Dangerous Woman” singer like?

“It was great,” Dove said. “We were all just around the fire eating chips and salsa. And I brought vegan mousse. I was in the corner with Ari and Ephraim [Sykes] and Colton talking about life and relationships. It’s just good. Everybody is sweet. It’s a good blend of professionalism and real friendships.”

Click inside to see what Ariana had to say about Dove…

Ariana is equally as enthused about the friendship revealing that she and Dove have taken to belting out show tunes together while paling around off set. “I’m not going to lie. Dove and I sang “Upon This Rock” in the kitchen a couple of months ago,” Ari told us.

Hairspray Live! premieres December 7 @ 8 p.m. on NBC!

– Reporting by Nicole Pajer