Ariana Grande, Mac Miller flirt during onstage duet

LOS ANGELES, Oct. 12 (UPI) -- New couple Ariana Grande and Mac Miller showed off their chemistry during a recent onstage duet.

The 23-year-old singer and 24-year-old rapper were all smiles while performing their song "My Favorite Part" for Mac Miller's Divine Feminine special for Audience Network.

Mac Miller shared a video of the duet this week, writing, "Here is My Favorite Part with @ArianaGrande on the angelic vocals." The rapper told Billboard in September that his Divine Feminine album was inspired by love.

"I really like love as a concept. On the last album, I realized there's no love songs, and I wanted to do a project based around that ... [to address] more emotional things that I would probably not want to say in fear of looking less cool," he revealed.

"I wanted ['My Favorite Part' to be] a foundation to paint on, something very simple with [Ariana]," the star said, adding that Grande is "a lot of fun" and one of his favorite artists to work with.

Grande and Mac Miller are longtime friends who re-sparked dating rumors in August. The rapper told People the next month that his relationship with Grande blossomed after they recorded "My Favorite Part."

"We're very good friends first and foremost," he said. "We made that song and started becoming close again. It's very dope and I like how that worked out."

"We hung out for a long time and everything just happened organically. We love making music together -- we do that always. But she's my best friend in the world," the star gushed.

Mac Miller's Audience Network special premiered Sept. 30, two weeks after the release of Divine Feminine. Grande, meanwhile, last released the album Dangerous Woman in May.