It doesn't get much sweeter than this. Charlie Puth found the cutest partner to join him for a duet on his No. 1 hit with Wiz Khalifa, "See You Again."

In the video posted on YouTube by Rolling Stone, the New Jersey native, 23, tells the little girl sitting beside him, "So we're going to sing 'See You Again.' They told me you know how to sing it."

The pair are sitting in New York City's Washington Square Park as he hums the first note for a warm up, and they then harmonize together on the song from the film Furious 7.

It gets even cuter when Puth encourages her with a sweet nudge.

"That was so good," he says as he gives her a hug.

Puth wrote the song with Khalifa, Andrew Cedar, and DJ Frank E, and revealed in an interview in April that he wrote the song last year after hearing that Fast & Furious producers were looking for a song to honor the late Paul Walker.

He hadn't seen any scenes from the film, but told American Songwriter magazine that he penned the song while thinking about a friend "who passed away in a very similar way to Paul." "When we finished writing it, it was a very powerful moment," he added.

The song, which hit the top of the charts in several countries, now holds the record for the most-streamed track in a single day on Spotify in the U.S.

"It's incredible," Puth said. "I never thought the movie company would pick 'See You Again.' Now it's exciting that the whole world is hearing and reacting to it."

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